252764881 has 4 divisors (see below), whose sum is σ = 253122100. Its totient is φ = 252407664.

The previous prime is 252764867. The next prime is 252764887. The reversal of 252764881 is 188467252.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 168584256 + 84180625 = 12984^2 + 9175^2 .

It is a cyclic number.

It is not a de Polignac number, because 252764881 - 2⁵ = 252764849 is a prime.

It is a super-2 number, since 2×252764881² = 127780170133888322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252764887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 177546 + ... + 178963.

It is an arithmetic number, because the mean of its divisors is an integer number (63280525).

Almost surely, 2^252764881 is an apocalyptic number.

It is an amenable number.

252764881 is a deficient number, since it is larger than the sum of its proper divisors (357219).

252764881 is an equidigital number, since it uses as much as digits as its factorization.

252764881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 357218.

The product of its digits is 215040, while the sum is 43.

The square root of 252764881 is about 15898.5811002114. The cubic root of 252764881 is about 632.2743703018.

The spelling of 252764881 in words is "two hundred fifty-two million, seven hundred sixty-four thousand, eight hundred eighty-one".