55316704221 has 8 divisors (see below), whose sum is σ = 81950672960. Its totient is φ = 36877802796.

The previous prime is 55316704199. The next prime is 55316704249. The reversal of 55316704221 is 12240761355.

55316704221 is a `hidden beast` number, since 5 + 531 + 67 + 0 + 42 + 21 = 666.

It is not a de Polignac number, because 55316704221 - 2²¹ = 55314607069 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55316704721) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1024383385 + ... + 1024383438.

It is an arithmetic number, because the mean of its divisors is an integer number (10243834120).

Almost surely, 2^55316704221 is an apocalyptic number.

It is an amenable number.

55316704221 is a deficient number, since it is larger than the sum of its proper divisors (26633968739).

55316704221 is a wasteful number, since it uses less digits than its factorization.

55316704221 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2048766832 (or 2048766826 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 55316704221 in words is "fifty-five billion, three hundred sixteen million, seven hundred four thousand, two hundred twenty-one".