231542604 has 48 divisors (see below), whose sum is σ = 604716000. Its totient is φ = 76612608.

The previous prime is 231542581. The next prime is 231542629. The reversal of 231542604 is 406245132.

231542604 is a `hidden beast` number, since 2 + 3 + 1 + 54 + 2 + 604 = 666.

It is a super-2 number, since 2×231542604² = 107223954934201632, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6972 + ... + 22620.

It is an arithmetic number, because the mean of its divisors is an integer number (12598250).

Almost surely, 2^231542604 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 231542604, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (302358000).

231542604 is an abundant number, since it is smaller than the sum of its proper divisors (373173396).

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

231542604 is a wasteful number, since it uses less digits than its factorization.

231542604 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15799 (or 15791 counting only the distinct ones).

The product of its (nonzero) digits is 5760, while the sum is 27.

The square root of 231542604 is about 15216.5240446036. The cubic root of 231542604 is about 614.0592875655.

Adding to 231542604 its reverse (406245132), we get a palindrome (637787736).

The spelling of 231542604 in words is "two hundred thirty-one million, five hundred forty-two thousand, six hundred four".