231442356 has 24 divisors (see below), whose sum is σ = 540285984. Its totient is φ = 77111200.

The previous prime is 231442349. The next prime is 231442411. The reversal of 231442356 is 653244132.

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, 38131 + ... + 43781.

It is an arithmetic number, because the mean of its divisors is an integer number (22511916).

Almost surely, 2^231442356 is an apocalyptic number.

It is an amenable number.

231442356 is an abundant number, since it is smaller than the sum of its proper divisors (308843628).

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

231442356 is a wasteful number, since it uses less digits than its factorization.

231442356 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9071 (or 9069 counting only the distinct ones).

The product of its digits is 17280, while the sum is 30.

The square root of 231442356 is about 15213.2296373913. The cubic root of 231442356 is about 613.9706543427.

Adding to 231442356 its reverse (653244132), we get a palindrome (884686488).

The spelling of 231442356 in words is "two hundred thirty-one million, four hundred forty-two thousand, three hundred fifty-six".