15231113125 has 10 divisors (see below), whose sum is σ = 19032799742. Its totient is φ = 12184890000.

The previous prime is 15231113123. The next prime is 15231113189. The reversal of 15231113125 is 52131113251.

It can be written as a sum of positive squares in 5 ways, for example, as 3856037409 + 11375075716 = 62097^2 + 106654^2 .

It is not a de Polignac number, because 15231113125 - 2¹ = 15231113123 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (25).

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 15231113125.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15231113123) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12184266 + ... + 12185515.

Almost surely, 2^15231113125 is an apocalyptic number.

It is an amenable number.

15231113125 is a deficient number, since it is larger than the sum of its proper divisors (3801686617).

15231113125 is an frugal number, since it uses more digits than its factorization.

15231113125 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24369801 (or 24369786 counting only the distinct ones).

The product of its digits is 900, while the sum is 25.

Adding to 15231113125 its reverse (52131113251), we get a palindrome (67362226376).

The spelling of 15231113125 in words is "fifteen billion, two hundred thirty-one million, one hundred thirteen thousand, one hundred twenty-five".