15231144131 has 4 divisors (see below), whose sum is σ = 17407021872. Its totient is φ = 13055266392.

The previous prime is 15231144113. The next prime is 15231144133. The reversal of 15231144131 is 13144113251.

15231144131 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a de Polignac number, because none of the positive numbers 2^k-15231144131 is a prime.

It is a super-2 number, since 2×15231144131² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 15231144131.

It is not an unprimeable number, because it can be changed into a prime (15231144133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1087938860 + ... + 1087938873.

It is an arithmetic number, because the mean of its divisors is an integer number (4351755468).

Almost surely, 2^15231144131 is an apocalyptic number.

15231144131 is a deficient number, since it is larger than the sum of its proper divisors (2175877741).

15231144131 is an equidigital number, since it uses as much as digits as its factorization.

15231144131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2175877740.

The product of its digits is 1440, while the sum is 26.

Adding to 15231144131 its reverse (13144113251), we get a palindrome (28375257382).

The spelling of 15231144131 in words is "fifteen billion, two hundred thirty-one million, one hundred forty-four thousand, one hundred thirty-one".