231521535240052 has 48 divisors (see below), whose sum is σ = 422087004743040. Its totient is φ = 111021131148800.

The previous prime is 231521535240049. The next prime is 231521535240053. The reversal of 231521535240052 is 250042535125132.

It is a junction number, because it is equal to n+sod(n) for n = 231521535239987 and 231521535240014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231521535240053) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 628146177 + ... + 628514647.

It is an arithmetic number, because the mean of its divisors is an integer number (8793479265480).

Almost surely, 2^{231521535240052} is an apocalyptic number.

It is an amenable number.

231521535240052 is a deficient number, since it is larger than the sum of its proper divisors (190565469502988).

231521535240052 is a wasteful number, since it uses less digits than its factorization.

231521535240052 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 433512 (or 433510 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 40.

The spelling of 231521535240052 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, five hundred thirty-five million, two hundred forty thousand, fifty-two".