55295372021 has 2 divisors, whose sum is σ = 55295372022. Its totient is φ = 55295372020.

The previous prime is 55295371951. The next prime is 55295372029. The reversal of 55295372021 is 12027359255.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54891804100 + 403567921 = 234290^2 + 20089^2 .

It is a cyclic number.

It is not a de Polignac number, because 55295372021 - 2¹⁰ = 55295370997 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 55295372021.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55295372029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27647686010 + 27647686011.

It is an arithmetic number, because the mean of its divisors is an integer number (27647686011).

Almost surely, 2^55295372021 is an apocalyptic number.

It is an amenable number.

55295372021 is a deficient number, since it is larger than the sum of its proper divisors (1).

55295372021 is an equidigital number, since it uses as much as digits as its factorization.

55295372021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 189000, while the sum is 41.

The spelling of 55295372021 in words is "fifty-five billion, two hundred ninety-five million, three hundred seventy-two thousand, twenty-one".