15249474381 has 16 divisors (see below), whose sum is σ = 20636683200. Its totient is φ = 10014994560.

The previous prime is 15249474367. The next prime is 15249474433. The reversal of 15249474381 is 18347494251.

It is not a de Polignac number, because 15249474381 - 2⁵ = 15249474349 is a prime.

It is a super-2 number, since 2×15249474381² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 15249474381.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15249474281) 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, 840 + ... + 174641.

It is an arithmetic number, because the mean of its divisors is an integer number (1289792700).

Almost surely, 2^15249474381 is an apocalyptic number.

It is an amenable number.

15249474381 is a deficient number, since it is larger than the sum of its proper divisors (5387208819).

15249474381 is a wasteful number, since it uses less digits than its factorization.

15249474381 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 175916.

The product of its digits is 967680, while the sum is 48.

The spelling of 15249474381 in words is "fifteen billion, two hundred forty-nine million, four hundred seventy-four thousand, three hundred eighty-one".