55215402155 has 16 divisors (see below), whose sum is σ = 68409702144. Its totient is φ = 42738752640.

The previous prime is 55215402119. The next prime is 55215402169. The reversal of 55215402155 is 55120451255.

55215402155 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 55215402155 - 2⁶ = 55215402091 is a prime.

It is a Duffinian 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, 793217 + ... + 860013.

It is an arithmetic number, because the mean of its divisors is an integer number (4275606384).

Almost surely, 2^55215402155 is an apocalyptic number.

55215402155 is a deficient number, since it is larger than the sum of its proper divisors (13194299989).

55215402155 is a wasteful number, since it uses less digits than its factorization.

55215402155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72166.

The product of its (nonzero) digits is 50000, while the sum is 35.

The spelling of 55215402155 in words is "fifty-five billion, two hundred fifteen million, four hundred two thousand, one hundred fifty-five".