231531534301145 has 24 divisors (see below), whose sum is σ = 301181365742400. Its totient is φ = 170791085514816.

The previous prime is 231531534301129. The next prime is 231531534301159. The reversal of 231531534301145 is 541103435135132.

It is not a de Polignac number, because 231531534301145 - 2⁴ = 231531534301129 is a prime.

It is a super-2 number, since 2×231531534301145² (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 23 ways as a sum of consecutive naturals, for example, 148299515 + ... + 149852624.

It is an arithmetic number, because the mean of its divisors is an integer number (12549223572600).

Almost surely, 2^{231531534301145} is an apocalyptic number.

It is an amenable number.

231531534301145 is a deficient number, since it is larger than the sum of its proper divisors (69649831441255).

231531534301145 is a wasteful number, since it uses less digits than its factorization.

231531534301145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 298153089 (or 298153076 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 41.

Adding to 231531534301145 its reverse (541103435135132), we get a palindrome (772634969436277).

The spelling of 231531534301145 in words is "two hundred thirty-one trillion, five hundred thirty-one billion, five hundred thirty-four million, three hundred one thousand, one hundred forty-five".