252255721 has 8 divisors (see below), whose sum is σ = 257846400. Its totient is φ = 246674448.

The previous prime is 252255709. The next prime is 252255733. The reversal of 252255721 is 127552252.

It is an interprime number because it is at equal distance from previous prime (252255709) and next prime (252255733).

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252255721 - 2⁹ = 252255209 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252255701) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 97375 + ... + 99931.

It is an arithmetic number, because the mean of its divisors is an integer number (32230800).

Almost surely, 2^252255721 is an apocalyptic number.

It is an amenable number.

252255721 is a deficient number, since it is larger than the sum of its proper divisors (5590679).

252255721 is a wasteful number, since it uses less digits than its factorization.

252255721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4703.

The product of its digits is 14000, while the sum is 31.

The square root of 252255721 is about 15882.5602784941. The cubic root of 252255721 is about 631.8495417421.

The spelling of 252255721 in words is "two hundred fifty-two million, two hundred fifty-five thousand, seven hundred twenty-one".