52620521 has 2 divisors, whose sum is σ = 52620522. Its totient is φ = 52620520.

The previous prime is 52620509. The next prime is 52620523. The reversal of 52620521 is 12502625.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49505296 + 3115225 = 7036^2 + 1765^2 .

It is a cyclic number.

It is not a de Polignac number, because 52620521 - 2¹⁸ = 52358377 is a prime.

It is a super-2 number, since 2×52620521² = 5537838460622882, which contains 22 as substring.

Together with 52620523, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (52620523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26310260 + 26310261.

It is an arithmetic number, because the mean of its divisors is an integer number (26310261).

Almost surely, 2^52620521 is an apocalyptic number.

It is an amenable number.

52620521 is a deficient number, since it is larger than the sum of its proper divisors (1).

52620521 is an equidigital number, since it uses as much as digits as its factorization.

52620521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 52620521 is about 7254.0003446374. Note that the first 3 decimals coincide. The cubic root of 52620521 is about 374.7299293969.

The spelling of 52620521 in words is "fifty-two million, six hundred twenty thousand, five hundred twenty-one".