15221055502406 has 48 divisors (see below), whose sum is σ = 25106165007696. Its totient is φ = 6916554897408.

The previous prime is 15221055502363. The next prime is 15221055502417. The reversal of 15221055502406 is 60420555012251.

It is a self number, because there is not a number n which added to its sum of digits gives 15221055502406.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 13343606 + ... + 14439318.

It is an arithmetic number, because the mean of its divisors is an integer number (523045104327).

Almost surely, 2^{15221055502406} is an apocalyptic number.

15221055502406 is a deficient number, since it is larger than the sum of its proper divisors (9885109505290).

15221055502406 is a wasteful number, since it uses less digits than its factorization.

15221055502406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1096377 (or 1096364 counting only the distinct ones).

The product of its (nonzero) digits is 120000, while the sum is 38.

The spelling of 15221055502406 in words is "fifteen trillion, two hundred twenty-one billion, fifty-five million, five hundred two thousand, four hundred six".