Search a number
-
+
131211301 = 1310093177
BaseRepresentation
bin1111101001000…
…10000000100101
3100010220020001211
413310202000211
5232042230201
621004151421
73152164144
oct764420045
9303806054
10131211301
1168079aa1
1237b38571
1321250c30
14135d775b
15b7bc651
hex7d22025

131211301 has 4 divisors (see below), whose sum is σ = 141304492. Its totient is φ = 121118112.

The previous prime is 131211281. The next prime is 131211307. The reversal of 131211301 is 103112131.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 103112131 = 400725733.

It can be written as a sum of positive squares in 2 ways, for example, as 38763076 + 92448225 = 6226^2 + 9615^2 .

It is a cyclic number.

It is not a de Polignac number, because 131211301 - 27 = 131211173 is a prime.

It is a super-2 number, since 2×1312113012 = 34432811020225202, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (13), and also a Moran number because the ratio is a prime number: 10093177 = 131211301 / (1 + 3 + 1 + 2 + 1 + 1 + 3 + 0 + 1).

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (131211307) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5046576 + ... + 5046601.

It is an arithmetic number, because the mean of its divisors is an integer number (35326123).

Almost surely, 2131211301 is an apocalyptic number.

It is an amenable number.

131211301 is a deficient number, since it is larger than the sum of its proper divisors (10093191).

131211301 is a wasteful number, since it uses less digits than its factorization.

131211301 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10093190.

The product of its (nonzero) digits is 18, while the sum is 13.

The square root of 131211301 is about 11454.7501500469. The cubic root of 131211301 is about 508.1482261673.

Adding to 131211301 its reverse (103112131), we get a palindrome (234323432).

The spelling of 131211301 in words is "one hundred thirty-one million, two hundred eleven thousand, three hundred one".

Divisors: 1 13 10093177 131211301