252561013 has 2 divisors, whose sum is σ = 252561014. Its totient is φ = 252561012.

The previous prime is 252560983. The next prime is 252561017. The reversal of 252561013 is 310165252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 210337009 + 42224004 = 14503^2 + 6498^2 .

It is a cyclic number.

It is not a de Polignac number, because 252561013 - 2²¹ = 250463861 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252561017) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126280506 + 126280507.

It is an arithmetic number, because the mean of its divisors is an integer number (126280507).

Almost surely, 2^252561013 is an apocalyptic number.

It is an amenable number.

252561013 is a deficient number, since it is larger than the sum of its proper divisors (1).

252561013 is an equidigital number, since it uses as much as digits as its factorization.

252561013 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1800, while the sum is 25.

The square root of 252561013 is about 15892.1682913314. The cubic root of 252561013 is about 632.1043372110.

The spelling of 252561013 in words is "two hundred fifty-two million, five hundred sixty-one thousand, thirteen".