52520813 has 2 divisors, whose sum is σ = 52520814. Its totient is φ = 52520812.

The previous prime is 52520779. The next prime is 52520857. The reversal of 52520813 is 31802525.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46280809 + 6240004 = 6803^2 + 2498^2 .

It is a cyclic number.

It is not a de Polignac number, because 52520813 - 2⁶ = 52520749 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (52520863) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 26260406 + 26260407.

It is an arithmetic number, because the mean of its divisors is an integer number (26260407).

Almost surely, 2^52520813 is an apocalyptic number.

It is an amenable number.

52520813 is a deficient number, since it is larger than the sum of its proper divisors (1).

52520813 is an equidigital number, since it uses as much as digits as its factorization.

52520813 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2400, while the sum is 26.

The square root of 52520813 is about 7247.1244642272. The cubic root of 52520813 is about 374.4930940620.

The spelling of 52520813 in words is "fifty-two million, five hundred twenty thousand, eight hundred thirteen".