15221102988 has 48 divisors (see below), whose sum is σ = 43711888640. Its totient is φ = 4014356544.

The previous prime is 15221102969. The next prime is 15221103011. The reversal of 15221102988 is 88920112251.

It is a Harshad number since it is a multiple of its sum of digits (39).

It is an unprimeable number.

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 15 ways as a sum of consecutive naturals, for example, 6968278 + ... + 6970461.

Almost surely, 2^15221102988 is an apocalyptic number.

It is an amenable number.

15221102988 is an abundant number, since it is smaller than the sum of its proper divisors (28490785652).

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

15221102988 is a wasteful number, since it uses less digits than its factorization.

15221102988 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13938766 (or 13938764 counting only the distinct ones).

The product of its (nonzero) digits is 23040, while the sum is 39.

The spelling of 15221102988 in words is "fifteen billion, two hundred twenty-one million, one hundred two thousand, nine hundred eighty-eight".