231221752492 has 6 divisors (see below), whose sum is σ = 404638066868. Its totient is φ = 115610876244.

The previous prime is 231221752481. The next prime is 231221752493. The reversal of 231221752492 is 294257122132.

It is not an unprimeable number, because it can be changed into a prime (231221752493) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28902719058 + ... + 28902719065.

Almost surely, 2^231221752492 is an apocalyptic number.

It is an amenable number.

231221752492 is a deficient number, since it is larger than the sum of its proper divisors (173416314376).

231221752492 is a wasteful number, since it uses less digits than its factorization.

231221752492 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 57805438127 (or 57805438125 counting only the distinct ones).

The product of its digits is 120960, while the sum is 40.

The spelling of 231221752492 in words is "two hundred thirty-one billion, two hundred twenty-one million, seven hundred fifty-two thousand, four hundred ninety-two".