252317557 has 2 divisors, whose sum is σ = 252317558. Its totient is φ = 252317556.

The previous prime is 252317551. The next prime is 252317609. The reversal of 252317557 is 755713252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 243796996 + 8520561 = 15614^2 + 2919^2 .

It is a cyclic number.

It is not a de Polignac number, because 252317557 - 2¹¹ = 252315509 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252317551) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126158778 + 126158779.

It is an arithmetic number, because the mean of its divisors is an integer number (126158779).

Almost surely, 2^252317557 is an apocalyptic number.

It is an amenable number.

252317557 is a deficient number, since it is larger than the sum of its proper divisors (1).

252317557 is an equidigital number, since it uses as much as digits as its factorization.

252317557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73500, while the sum is 37.

The square root of 252317557 is about 15884.5068226873. The cubic root of 252317557 is about 631.9011664135.

The spelling of 252317557 in words is "two hundred fifty-two million, three hundred seventeen thousand, five hundred fifty-seven".