231141973545 has 192 divisors, whose sum is σ = 488079360000. Its totient is φ = 101662957440.

The previous prime is 231141973493. The next prime is 231141973609. The reversal of 231141973545 is 545379141132.

231141973545 is a `hidden beast` number, since 2 + 3 + 1 + 14 + 1 + 97 + 3 + 545 = 666.

It is not a de Polignac number, because 231141973545 - 2¹⁰ = 231141972521 is a prime.

It is a super-2 number, since 2×231141973545² (a number of 24 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 231141973545.

It is an unprimeable number.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 180720216 + ... + 180721494.

It is an arithmetic number, because the mean of its divisors is an integer number (2542080000).

Almost surely, 2^231141973545 is an apocalyptic number.

It is an amenable number.

231141973545 is an abundant number, since it is smaller than the sum of its proper divisors (256937386455).

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

231141973545 is a wasteful number, since it uses less digits than its factorization.

231141973545 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1561 (or 1524 counting only the distinct ones).

The product of its digits is 453600, while the sum is 45.

The spelling of 231141973545 in words is "two hundred thirty-one billion, one hundred forty-one million, nine hundred seventy-three thousand, five hundred forty-five".