231545511541320 has 128 divisors (see below), whose sum is σ = 732300424151040. Its totient is φ = 58482325451520.

The previous prime is 231545511541313. The next prime is 231545511541349. The reversal of 231545511541320 is 23145115545132.

It is a super-2 number, since 2×231545511541320² (a number of 30 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 661989172 + ... + 662338851.

It is an arithmetic number, because the mean of its divisors is an integer number (5721097063680).

Almost surely, 2^{231545511541320} is an apocalyptic number.

231545511541320 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

231545511541320 is an abundant number, since it is smaller than the sum of its proper divisors (500754912609720).

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

231545511541320 is a wasteful number, since it uses less digits than its factorization.

231545511541320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1324328115 (or 1324328111 counting only the distinct ones).

The product of its (nonzero) digits is 360000, while the sum is 42.

The spelling of 231545511541320 in words is "two hundred thirty-one trillion, five hundred forty-five billion, five hundred eleven million, five hundred forty-one thousand, three hundred twenty".