231542224 has 20 divisors (see below), whose sum is σ = 463085440. Its totient is φ = 112036320.

The previous prime is 231542167. The next prime is 231542237. The reversal of 231542224 is 422245132.

231542224 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

231542224 is an admirable number.

It is a super-2 number, since 2×231542224² = 107223602989732352, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 232914 + ... + 233905.

It is an arithmetic number, because the mean of its divisors is an integer number (23154272).

Almost surely, 2^231542224 is an apocalyptic number.

It is an amenable number.

231542224 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

231542224 is a wasteful number, since it uses less digits than its factorization.

231542224 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 466858 (or 466852 counting only the distinct ones).

The product of its digits is 3840, while the sum is 25.

The square root of 231542224 is about 15216.5115581726. The cubic root of 231542224 is about 614.0589516408.

Adding to 231542224 its reverse (422245132), we get a palindrome (653787356).

The spelling of 231542224 in words is "two hundred thirty-one million, five hundred forty-two thousand, two hundred twenty-four".