15231144540231 has 16 divisors (see below), whose sum is σ = 22581923097600. Its totient is φ = 10146327326424.

The previous prime is 15231144540211. The next prime is 15231144540277. The reversal of 15231144540231 is 13204544113251.

15231144540231 is a `hidden beast` number, since 1 + 5 + 231 + 14 + 4 + 5 + 402 + 3 + 1 = 666.

It is not a de Polignac number, because 15231144540231 - 2⁶ = 15231144540167 is a prime.

It is a super-2 number, since 2×15231144540231² (a number of 27 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231144540211) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 215770551 + ... + 215841128.

It is an arithmetic number, because the mean of its divisors is an integer number (1411370193600).

Almost surely, 2^{15231144540231} is an apocalyptic number.

15231144540231 is a deficient number, since it is larger than the sum of its proper divisors (7350778557369).

15231144540231 is a wasteful number, since it uses less digits than its factorization.

15231144540231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 431612995 (or 431612989 counting only the distinct ones).

The product of its (nonzero) digits is 57600, while the sum is 36.

Adding to 15231144540231 its reverse (13204544113251), we get a palindrome (28435688653482).

The spelling of 15231144540231 in words is "fifteen trillion, two hundred thirty-one billion, one hundred forty-four million, five hundred forty thousand, two hundred thirty-one".