231541787145131 has 8 divisors (see below), whose sum is σ = 233936257765584. Its totient is φ = 229149316087200.

The previous prime is 231541787145107. The next prime is 231541787145167. The reversal of 231541787145131 is 131541787145132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-231541787145131 is a prime.

It is a super-2 number, since 2×231541787145131² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (231541787145181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 499657841 + ... + 500121026.

It is an arithmetic number, because the mean of its divisors is an integer number (29242032220698).

Almost surely, 2^{231541787145131} is an apocalyptic number.

231541787145131 is a deficient number, since it is larger than the sum of its proper divisors (2394470620453).

231541787145131 is a wasteful number, since it uses less digits than its factorization.

231541787145131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 999781261.

The product of its digits is 2822400, while the sum is 53.

Subtracting from 231541787145131 its reverse (131541787145132), we obtain a palindrome (99999999999999).

The spelling of 231541787145131 in words is "two hundred thirty-one trillion, five hundred forty-one billion, seven hundred eighty-seven million, one hundred forty-five thousand, one hundred thirty-one".