53156363021 has 2 divisors, whose sum is σ = 53156363022. Its totient is φ = 53156363020.

The previous prime is 53156363003. The next prime is 53156363053. The reversal of 53156363021 is 12036365135.

53156363021 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., 52801605796 + 354757225 = 229786^2 + 18835^2 .

It is a cyclic number.

It is not a de Polignac number, because 53156363021 - 2³⁰ = 52082621197 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 (53156363321) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26578181510 + 26578181511.

It is an arithmetic number, because the mean of its divisors is an integer number (26578181511).

Almost surely, 2^53156363021 is an apocalyptic number.

It is an amenable number.

53156363021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53156363021 is an equidigital number, since it uses as much as digits as its factorization.

53156363021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48600, while the sum is 35.

The spelling of 53156363021 in words is "fifty-three billion, one hundred fifty-six million, three hundred sixty-three thousand, twenty-one".