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131233 = 196907
BaseRepresentation
bin100000000010100001
320200000111
4200002201
513144413
62451321
71054414
oct400241
9220014
10131233
118a663
1263b41
134796b
1435b7b
1528d3d
hex200a1

131233 has 4 divisors (see below), whose sum is σ = 138160. Its totient is φ = 124308.

The previous prime is 131231. The next prime is 131249. The reversal of 131233 is 332131.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 332131 = 1991669.

It is a cyclic number.

It is not a de Polignac number, because 131233 - 21 = 131231 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (131231) 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, 3435 + ... + 3472.

It is an arithmetic number, because the mean of its divisors is an integer number (34540).

2131233 is an apocalyptic number.

It is an amenable number.

131233 is a deficient number, since it is larger than the sum of its proper divisors (6927).

131233 is an equidigital number, since it uses as much as digits as its factorization.

131233 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6926.

The product of its digits is 54, while the sum is 13.

The square root of 131233 is about 362.2609556659. The cubic root of 131233 is about 50.8176236205.

Adding to 131233 its reverse (332131), we get a palindrome (463364).

The spelling of 131233 in words is "one hundred thirty-one thousand, two hundred thirty-three".

Divisors: 1 19 6907 131233