15221330055 has 80 divisors (see below), whose sum is σ = 27888854400. Its totient is φ = 7939995840.

The previous prime is 15221329993. The next prime is 15221330099. The reversal of 15221330055 is 55003312251.

It is a happy number.

15221330055 is a `hidden beast` number, since 1 + 522 + 133 + 0 + 0 + 5 + 5 = 666.

It is not a de Polignac number, because 15221330055 - 2⁷ = 15221329927 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 5040336 + ... + 5043354.

It is an arithmetic number, because the mean of its divisors is an integer number (348610680).

Almost surely, 2^15221330055 is an apocalyptic number.

15221330055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15221330055 is a deficient number, since it is larger than the sum of its proper divisors (12667524345).

15221330055 is a wasteful number, since it uses less digits than its factorization.

15221330055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3306 (or 3297 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 27.

The spelling of 15221330055 in words is "fifteen billion, two hundred twenty-one million, three hundred thirty thousand, fifty-five".