231255616 has 28 divisors (see below), whose sum is σ = 478852992. Its totient is φ = 110599808.

The previous prime is 231255613. The next prime is 231255653. The reversal of 231255616 is 616552132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231255611) 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, 77080 + ... + 80023.

Almost surely, 2^231255616 is an apocalyptic number.

It is an amenable number.

231255616 is an abundant number, since it is smaller than the sum of its proper divisors (247597376).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231255616 is a wasteful number, since it uses less digits than its factorization.

231255616 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157138 (or 157128 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 231255616 is about 15207.0909775670. The cubic root of 231255616 is about 613.8054818540.

The spelling of 231255616 in words is "two hundred thirty-one million, two hundred fifty-five thousand, six hundred sixteen".