55932722921 has 2 divisors, whose sum is σ = 55932722922. Its totient is φ = 55932722920.

The previous prime is 55932722917. The next prime is 55932723079. The reversal of 55932722921 is 12922723955.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 54470425321 + 1462297600 = 233389^2 + 38240^2 .

It is a cyclic number.

It is not a de Polignac number, because 55932722921 - 2² = 55932722917 is a prime.

It is not a weakly prime, because it can be changed into another prime (55932712921) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27966361460 + 27966361461.

It is an arithmetic number, because the mean of its divisors is an integer number (27966361461).

Almost surely, 2^55932722921 is an apocalyptic number.

It is an amenable number.

55932722921 is a deficient number, since it is larger than the sum of its proper divisors (1).

55932722921 is an equidigital number, since it uses as much as digits as its factorization.

55932722921 is an evil number, because the sum of its binary digits is even.

The product of its digits is 680400, while the sum is 47.

The spelling of 55932722921 in words is "fifty-five billion, nine hundred thirty-two million, seven hundred twenty-two thousand, nine hundred twenty-one".