15221552120 has 16 divisors (see below), whose sum is σ = 34248492360. Its totient is φ = 6088620832.

The previous prime is 15221552083. The next prime is 15221552153. The reversal of 15221552120 is 2125512251.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 15221552120.

It is a congruent number.

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 3 ways as a sum of consecutive naturals, for example, 190269362 + ... + 190269441.

Almost surely, 2^15221552120 is an apocalyptic number.

15221552120 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

15221552120 is an abundant number, since it is smaller than the sum of its proper divisors (19026940240).

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

15221552120 is a wasteful number, since it uses less digits than its factorization.

15221552120 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 380538814 (or 380538810 counting only the distinct ones).

The product of its (nonzero) digits is 2000, while the sum is 26.

The spelling of 15221552120 in words is "fifteen billion, two hundred twenty-one million, five hundred fifty-two thousand, one hundred twenty".