51900521 has 2 divisors, whose sum is σ = 51900522. Its totient is φ = 51900520.

The previous prime is 51900467. The next prime is 51900539. The reversal of 51900521 is 12500915.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 51768025 + 132496 = 7195^2 + 364^2 .

It is a cyclic number.

It is not a de Polignac number, because 51900521 - 2¹⁴ = 51884137 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51900221) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25950260 + 25950261.

It is an arithmetic number, because the mean of its divisors is an integer number (25950261).

Almost surely, 2^51900521 is an apocalyptic number.

It is an amenable number.

51900521 is a deficient number, since it is larger than the sum of its proper divisors (1).

51900521 is an equidigital number, since it uses as much as digits as its factorization.

51900521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450, while the sum is 23.

The square root of 51900521 is about 7204.2016212763. The cubic root of 51900521 is about 373.0129467675.

The spelling of 51900521 in words is "fifty-one million, nine hundred thousand, five hundred twenty-one".