15221409604 has 12 divisors (see below), whose sum is σ = 26776931328. Its totient is φ = 7570857800.

The previous prime is 15221409601. The next prime is 15221409611. The reversal of 15221409604 is 40690412251.

It is a self number, because there is not a number n which added to its sum of digits gives 15221409604.

It is not an unprimeable number, because it can be changed into a prime (15221409601) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9960892 + ... + 9962419.

It is an arithmetic number, because the mean of its divisors is an integer number (2231410944).

Almost surely, 2^15221409604 is an apocalyptic number.

It is an amenable number.

15221409604 is a deficient number, since it is larger than the sum of its proper divisors (11555521724).

15221409604 is a wasteful number, since it uses less digits than its factorization.

15221409604 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19923506 (or 19923504 counting only the distinct ones).

The product of its (nonzero) digits is 17280, while the sum is 34.

The spelling of 15221409604 in words is "fifteen billion, two hundred twenty-one million, four hundred nine thousand, six hundred four".