231356623 has 4 divisors (see below), whose sum is σ = 232742160. Its totient is φ = 229971088.

The previous prime is 231356617. The next prime is 231356633. The reversal of 231356623 is 326653132.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231356623 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231356633) 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, 692518 + ... + 692851.

It is an arithmetic number, because the mean of its divisors is an integer number (58185540).

Almost surely, 2^231356623 is an apocalyptic number.

231356623 is a deficient number, since it is larger than the sum of its proper divisors (1385537).

231356623 is a wasteful number, since it uses less digits than its factorization.

231356623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1385536.

The product of its digits is 19440, while the sum is 31.

The square root of 231356623 is about 15210.4116643831. The cubic root of 231356623 is about 613.8948340998.

The spelling of 231356623 in words is "two hundred thirty-one million, three hundred fifty-six thousand, six hundred twenty-three".