231325450520 has 32 divisors (see below), whose sum is σ = 532586506320. Its totient is φ = 90378314880.

The previous prime is 231325450507. The next prime is 231325450529. The reversal of 231325450520 is 25054523132.

It is a super-2 number, since 2×231325450520² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231325450529) 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, 67244051 + ... + 67247490.

Almost surely, 2^231325450520 is an apocalyptic number.

231325450520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231325450520 is an abundant number, since it is smaller than the sum of its proper divisors (301261055800).

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

231325450520 is a wasteful number, since it uses less digits than its factorization.

231325450520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 134491595 (or 134491591 counting only the distinct ones).

The product of its (nonzero) digits is 36000, while the sum is 32.

Adding to 231325450520 its reverse (25054523132), we get a palindrome (256379973652).

The spelling of 231325450520 in words is "two hundred thirty-one billion, three hundred twenty-five million, four hundred fifty thousand, five hundred twenty".