252313921 has 2 divisors, whose sum is σ = 252313922. Its totient is φ = 252313920.

The previous prime is 252313883. The next prime is 252313927. The reversal of 252313921 is 129313252.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 250873921 + 1440000 = 15839^2 + 1200^2 .

It is a cyclic number.

It is not a de Polignac number, because 252313921 - 2⁷ = 252313793 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 252313921.

It is not a weakly prime, because it can be changed into another prime (252313927) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 126156960 + 126156961.

It is an arithmetic number, because the mean of its divisors is an integer number (126156961).

Almost surely, 2^252313921 is an apocalyptic number.

It is an amenable number.

252313921 is a deficient number, since it is larger than the sum of its proper divisors (1).

252313921 is an equidigital number, since it uses as much as digits as its factorization.

252313921 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 3240, while the sum is 28.

The square root of 252313921 is about 15884.3923711296. The cubic root of 252313921 is about 631.8981310802.

The spelling of 252313921 in words is "two hundred fifty-two million, three hundred thirteen thousand, nine hundred twenty-one".