55073597021 has 2 divisors, whose sum is σ = 55073597022. Its totient is φ = 55073597020.

The previous prime is 55073597017. The next prime is 55073597063. The reversal of 55073597021 is 12079537055.

55073597021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32503041796 + 22570555225 = 180286^2 + 150235^2 .

It is a cyclic number.

It is not a de Polignac number, because 55073597021 - 2² = 55073597017 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (55073597071) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 27536798510 + 27536798511.

It is an arithmetic number, because the mean of its divisors is an integer number (27536798511).

Almost surely, 2^55073597021 is an apocalyptic number.

It is an amenable number.

55073597021 is a deficient number, since it is larger than the sum of its proper divisors (1).

55073597021 is an equidigital number, since it uses as much as digits as its factorization.

55073597021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 330750, while the sum is 44.

The spelling of 55073597021 in words is "fifty-five billion, seventy-three million, five hundred ninety-seven thousand, twenty-one".