231773225520 has 40 divisors (see below), whose sum is σ = 718496999856. Its totient is φ = 61806193408.

The previous prime is 231773225513. The next prime is 231773225521. The reversal of 231773225520 is 25522377132.

It is a tau number, because it is divible by the number of its divisors (40).

It is not an unprimeable number, because it can be changed into a prime (231773225521) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 482860647 + ... + 482861126.

Almost surely, 2^231773225520 is an apocalyptic number.

231773225520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231773225520 is an abundant number, since it is smaller than the sum of its proper divisors (486723774336).

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

231773225520 is a wasteful number, since it uses less digits than its factorization.

231773225520 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 965721789 (or 965721783 counting only the distinct ones).

The product of its (nonzero) digits is 176400, while the sum is 39.

The spelling of 231773225520 in words is "two hundred thirty-one billion, seven hundred seventy-three million, two hundred twenty-five thousand, five hundred twenty".