55622503921 has 2 divisors, whose sum is σ = 55622503922. Its totient is φ = 55622503920.

The previous prime is 55622503913. The next prime is 55622503931. The reversal of 55622503921 is 12930522655.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 53066190321 + 2556313600 = 230361^2 + 50560^2 .

It is a cyclic number.

It is not a de Polignac number, because 55622503921 - 2³ = 55622503913 is a prime.

It is not a weakly prime, because it can be changed into another prime (55622503901) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27811251960 + 27811251961.

It is an arithmetic number, because the mean of its divisors is an integer number (27811251961).

Almost surely, 2^55622503921 is an apocalyptic number.

It is an amenable number.

55622503921 is a deficient number, since it is larger than the sum of its proper divisors (1).

55622503921 is an equidigital number, since it uses as much as digits as its factorization.

55622503921 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 162000, while the sum is 40.

The spelling of 55622503921 in words is "fifty-five billion, six hundred twenty-two million, five hundred three thousand, nine hundred twenty-one".