231022512 has 60 divisors (see below), whose sum is σ = 738908560. Its totient is φ = 66006144.

The previous prime is 231022489. The next prime is 231022513. The reversal of 231022512 is 215220132.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (231022513) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 113587 + ... + 115602.

Almost surely, 2^231022512 is an apocalyptic number.

It is an amenable number.

231022512 is an abundant number, since it is smaller than the sum of its proper divisors (507886048).

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

231022512 is a wasteful number, since it uses less digits than its factorization.

231022512 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229210 (or 229201 counting only the distinct ones).

The product of its (nonzero) digits is 240, while the sum is 18.

The square root of 231022512 is about 15199.4247259559. The cubic root of 231022512 is about 613.5991753475.

Adding to 231022512 its reverse (215220132), we get a palindrome (446242644).

The spelling of 231022512 in words is "two hundred thirty-one million, twenty-two thousand, five hundred twelve".