231545430403120 has 80 divisors (see below), whose sum is σ = 547587082460448. Its totient is φ = 91030137477120.

The previous prime is 231545430403117. The next prime is 231545430403139. The reversal of 231545430403120 is 21304034545132.

It is a tau number, because it is divible by the number of its divisors (80).

It is a super-2 number, since 2×231545430403120² (a number of 30 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 231545430403120.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 11773269 + ... + 24529588.

Almost surely, 2^{231545430403120} is an apocalyptic number.

231545430403120 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231545430403120 is an abundant number, since it is smaller than the sum of its proper divisors (316041652057328).

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

231545430403120 is a wasteful number, since it uses less digits than its factorization.

231545430403120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36304238 (or 36304232 counting only the distinct ones).

The product of its (nonzero) digits is 172800, while the sum is 37.

Adding to 231545430403120 its reverse (21304034545132), we get a palindrome (252849464948252).

The spelling of 231545430403120 in words is "two hundred thirty-one trillion, five hundred forty-five billion, four hundred thirty million, four hundred three thousand, one hundred twenty".