252179387261 has 2 divisors, whose sum is σ = 252179387262. Its totient is φ = 252179387260.

The previous prime is 252179387189. The next prime is 252179387263. The reversal of 252179387261 is 162783971252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 194497758361 + 57681628900 = 441019^2 + 240170^2 .

It is a cyclic number.

It is not a de Polignac number, because 252179387261 - 2³⁴ = 234999518077 is a prime.

Together with 252179387263, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (252179387263) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126089693630 + 126089693631.

It is an arithmetic number, because the mean of its divisors is an integer number (126089693631).

Almost surely, 2^252179387261 is an apocalyptic number.

It is an amenable number.

252179387261 is a deficient number, since it is larger than the sum of its proper divisors (1).

252179387261 is an equidigital number, since it uses as much as digits as its factorization.

252179387261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2540160, while the sum is 53.

The spelling of 252179387261 in words is "two hundred fifty-two billion, one hundred seventy-nine million, three hundred eighty-seven thousand, two hundred sixty-one".