55213111615 has 16 divisors (see below), whose sum is σ = 70179625152. Its totient is φ = 41556524544.

The previous prime is 55213111601. The next prime is 55213111651. The reversal of 55213111615 is 51611131255.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 55213111615 - 2⁷ = 55213111487 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 106222 + ... + 348868.

It is an arithmetic number, because the mean of its divisors is an integer number (4386226572).

Almost surely, 2^55213111615 is an apocalyptic number.

55213111615 is a deficient number, since it is larger than the sum of its proper divisors (14966513537).

55213111615 is a wasteful number, since it uses less digits than its factorization.

55213111615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 245346.

The product of its digits is 4500, while the sum is 31.

The spelling of 55213111615 in words is "fifty-five billion, two hundred thirteen million, one hundred eleven thousand, six hundred fifteen".