53537035021 has 2 divisors, whose sum is σ = 53537035022. Its totient is φ = 53537035020.

The previous prime is 53537034919. The next prime is 53537035049. The reversal of 53537035021 is 12053073535.

53537035021 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 45330668100 + 8206366921 = 212910^2 + 90589^2 .

It is a cyclic number.

It is not a de Polignac number, because 53537035021 - 2¹¹ = 53537032973 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53537035081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26768517510 + 26768517511.

It is an arithmetic number, because the mean of its divisors is an integer number (26768517511).

Almost surely, 2^53537035021 is an apocalyptic number.

It is an amenable number.

53537035021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53537035021 is an equidigital number, since it uses as much as digits as its factorization.

53537035021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 47250, while the sum is 34.

The spelling of 53537035021 in words is "fifty-three billion, five hundred thirty-seven million, thirty-five thousand, twenty-one".