231355392 has 88 divisors (see below), whose sum is σ = 622550016. Its totient is φ = 76382208.

The previous prime is 231355361. The next prime is 231355403. The reversal of 231355392 is 293553132.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 389848 + ... + 390440.

It is an arithmetic number, because the mean of its divisors is an integer number (7074432).

Almost surely, 2^231355392 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231355392, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (311275008).

231355392 is an abundant number, since it is smaller than the sum of its proper divisors (391194624).

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

231355392 is a wasteful number, since it uses less digits than its factorization.

231355392 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 743 (or 725 counting only the distinct ones).

The product of its digits is 24300, while the sum is 33.

The square root of 231355392 is about 15210.3711986263. The cubic root of 231355392 is about 613.8937452961.

The spelling of 231355392 in words is "two hundred thirty-one million, three hundred fifty-five thousand, three hundred ninety-two".