15221668732 has 48 divisors (see below), whose sum is σ = 28732483584. Its totient is φ = 7035336000.

The previous prime is 15221668711. The next prime is 15221668751. The reversal of 15221668732 is 23786612251.

It is a Smith number, since the sum of its digits (43) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2309682 + ... + 2316262.

It is an arithmetic number, because the mean of its divisors is an integer number (598593408).

Almost surely, 2^15221668732 is an apocalyptic number.

It is an amenable number.

15221668732 is a deficient number, since it is larger than the sum of its proper divisors (13510814852).

15221668732 is a wasteful number, since it uses less digits than its factorization.

15221668732 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7450 (or 7448 counting only the distinct ones).

The product of its digits is 241920, while the sum is 43.

The spelling of 15221668732 in words is "fifteen billion, two hundred twenty-one million, six hundred sixty-eight thousand, seven hundred thirty-two".