15113431144 has 32 divisors (see below), whose sum is σ = 33261223680. Its totient is φ = 6302124864.

The previous prime is 15113431141. The next prime is 15113431153. The reversal of 15113431144 is 44113431151.

It is a Harshad number since it is a multiple of its sum of digits (28).

It is not an unprimeable number, because it can be changed into a prime (15113431141) 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, 3644992 + ... + 3649135.

It is an arithmetic number, because the mean of its divisors is an integer number (1039413240).

Almost surely, 2^15113431144 is an apocalyptic number.

15113431144 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

15113431144 is an abundant number, since it is smaller than the sum of its proper divisors (18147792536).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15113431144 is a wasteful number, since it uses less digits than its factorization.

15113431144 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7294177 (or 7294173 counting only the distinct ones).

The product of its digits is 2880, while the sum is 28.

Adding to 15113431144 its reverse (44113431151), we get a palindrome (59226862295).

The spelling of 15113431144 in words is "fifteen billion, one hundred thirteen million, four hundred thirty-one thousand, one hundred forty-four".