Search a number
-
+
315149 = 893541
BaseRepresentation
bin1001100111100001101
3121000022012
41030330031
540041044
610431005
72451542
oct1147415
9530265
10315149
111a585a
12132465
13b05a3
1482bc9
156359e
hex4cf0d

315149 has 4 divisors (see below), whose sum is σ = 318780. Its totient is φ = 311520.

The previous prime is 315127. The next prime is 315179. The reversal of 315149 is 941513.

It is a happy number.

315149 is nontrivially palindromic in base 7.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 94249 + 220900 = 307^2 + 470^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-315149 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (315109) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1682 + ... + 1859.

It is an arithmetic number, because the mean of its divisors is an integer number (79695).

2315149 is an apocalyptic number.

It is an amenable number.

315149 is a deficient number, since it is larger than the sum of its proper divisors (3631).

315149 is an equidigital number, since it uses as much as digits as its factorization.

315149 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3630.

The product of its digits is 540, while the sum is 23.

The square root of 315149 is about 561.3813320730. The cubic root of 315149 is about 68.0516476137.

Multiplying 315149 by its sum of digits (23), we get a palindrome (7248427).

It can be divided in two parts, 315 and 149, that added together give a palindrome (464).

The spelling of 315149 in words is "three hundred fifteen thousand, one hundred forty-nine".

Divisors: 1 89 3541 315149