252947557 has 2 divisors, whose sum is σ = 252947558. Its totient is φ = 252947556.

The previous prime is 252947533. The next prime is 252947587. The reversal of 252947557 is 755749252.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 202948516 + 49999041 = 14246^2 + 7071^2 .

It is a cyclic number.

It is not a de Polignac number, because 252947557 - 2²³ = 244558949 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252947587) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126473778 + 126473779.

It is an arithmetic number, because the mean of its divisors is an integer number (126473779).

Almost surely, 2^252947557 is an apocalyptic number.

It is an amenable number.

252947557 is a deficient number, since it is larger than the sum of its proper divisors (1).

252947557 is an equidigital number, since it uses as much as digits as its factorization.

252947557 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 882000, while the sum is 46.

The square root of 252947557 is about 15904.3251035685. The cubic root of 252947557 is about 632.4266508703.

It can be divided in two parts, 2529 and 47557, that added together give a triangular number (50086 = T₃₁₆).

The spelling of 252947557 in words is "two hundred fifty-two million, nine hundred forty-seven thousand, five hundred fifty-seven".