53540503021 has 2 divisors, whose sum is σ = 53540503022. Its totient is φ = 53540503020.

The previous prime is 53540502973. The next prime is 53540503043. The reversal of 53540503021 is 12030504535.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 53432634025 + 107868996 = 231155^2 + 10386^2 .

It is a cyclic number.

It is not a de Polignac number, because 53540503021 - 2⁷ = 53540502893 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (53540503061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26770251510 + 26770251511.

It is an arithmetic number, because the mean of its divisors is an integer number (26770251511).

Almost surely, 2^53540503021 is an apocalyptic number.

It is an amenable number.

53540503021 is a deficient number, since it is larger than the sum of its proper divisors (1).

53540503021 is an equidigital number, since it uses as much as digits as its factorization.

53540503021 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 9000, while the sum is 28.

The spelling of 53540503021 in words is "fifty-three billion, five hundred forty million, five hundred three thousand, twenty-one".