55212112155 has 16 divisors (see below), whose sum is σ = 89013729024. Its totient is φ = 29221676640.

The previous prime is 55212112147. The next prime is 55212112157. The reversal of 55212112155 is 55121121255.

It is not a de Polignac number, because 55212112155 - 2³ = 55212112147 is a prime.

It is not an unprimeable number, because it can be changed into a prime (55212112157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 14046919 + ... + 14050848.

It is an arithmetic number, because the mean of its divisors is an integer number (5563358064).

Almost surely, 2^55212112155 is an apocalyptic number.

55212112155 is a deficient number, since it is larger than the sum of its proper divisors (33801616869).

55212112155 is a wasteful number, since it uses less digits than its factorization.

55212112155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28097906.

The product of its digits is 5000, while the sum is 30.

The spelling of 55212112155 in words is "fifty-five billion, two hundred twelve million, one hundred twelve thousand, one hundred fifty-five".