231521000250144 has 96 divisors (see below), whose sum is σ = 670979810398464. Its totient is φ = 69312603188480.

The previous prime is 231521000250143. The next prime is 231521000250247. The reversal of 231521000250144 is 441052000125132.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×231521000250144² (a number of 30 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (231521000250143) 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 in 15 ways as a sum of consecutive naturals, for example, 1320655554 + ... + 1320830849.

It is an arithmetic number, because the mean of its divisors is an integer number (6989373024984).

Almost surely, 2^{231521000250144} is an apocalyptic number.

231521000250144 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

231521000250144 is an abundant number, since it is smaller than the sum of its proper divisors (439458810148320).

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

231521000250144 is a wasteful number, since it uses less digits than its factorization.

231521000250144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2641486510 (or 2641486502 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 231521000250144 its reverse (441052000125132), we get a palindrome (672573000375276).

The spelling of 231521000250144 in words is "two hundred thirty-one trillion, five hundred twenty-one billion, two hundred fifty thousand, one hundred forty-four".