231550441340520 has 128 divisors (see below), whose sum is σ = 702444958807680. Its totient is φ = 61057371648000.

The previous prime is 231550441340497. The next prime is 231550441340539. The reversal of 231550441340520 is 25043144055132.

It is an unprimeable number.

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 in 31 ways as a sum of consecutive naturals, for example, 21792061 + ... + 30626700.

It is an arithmetic number, because the mean of its divisors is an integer number (5487851240685).

Almost surely, 2^{231550441340520} is an apocalyptic number.

231550441340520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231550441340520 is an abundant number, since it is smaller than the sum of its proper divisors (470894517467160).

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

231550441340520 is a wasteful number, since it uses less digits than its factorization.

231550441340520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52419187 (or 52419183 counting only the distinct ones).

The product of its (nonzero) digits is 288000, while the sum is 39.

Adding to 231550441340520 its reverse (25043144055132), we get a palindrome (256593585395652).

The spelling of 231550441340520 in words is "two hundred thirty-one trillion, five hundred fifty billion, four hundred forty-one million, three hundred forty thousand, five hundred twenty".