252562021009 has 2 divisors, whose sum is σ = 252562021010. Its totient is φ = 252562021008.

The previous prime is 252562020989. The next prime is 252562021043. The reversal of 252562021009 is 900120265252.

It is an a-pointer prime, because the next prime (252562021043) can be obtained adding 252562021009 to its sum of digits (34).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 208081945600 + 44480075409 = 456160^2 + 210903^2 .

It is a cyclic number.

It is not a de Polignac number, because 252562021009 - 2³⁷ = 115123067537 is a prime.

It is not a weakly prime, because it can be changed into another prime (252562021079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126281010504 + 126281010505.

It is an arithmetic number, because the mean of its divisors is an integer number (126281010505).

Almost surely, 2^252562021009 is an apocalyptic number.

It is an amenable number.

252562021009 is a deficient number, since it is larger than the sum of its proper divisors (1).

252562021009 is an equidigital number, since it uses as much as digits as its factorization.

252562021009 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 21600, while the sum is 34.

The spelling of 252562021009 in words is "two hundred fifty-two billion, five hundred sixty-two million, twenty-one thousand, nine".