252320081 has 4 divisors (see below), whose sum is σ = 271729332. Its totient is φ = 232910832.

The previous prime is 252320077. The next prime is 252320141. The reversal of 252320081 is 180023252.

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 130416400 + 121903681 = 11420^2 + 11041^2 .

It is a cyclic number.

It is not a de Polignac number, because 252320081 - 2² = 252320077 is a prime.

It is a super-2 number, since 2×252320081² = 127330846551693122, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252320071) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9704606 + ... + 9704631.

It is an arithmetic number, because the mean of its divisors is an integer number (67932333).

Almost surely, 2^252320081 is an apocalyptic number.

It is an amenable number.

252320081 is a deficient number, since it is larger than the sum of its proper divisors (19409251).

252320081 is a wasteful number, since it uses less digits than its factorization.

252320081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19409250.

The product of its (nonzero) digits is 960, while the sum is 23.

The square root of 252320081 is about 15884.5862709735. The cubic root of 252320081 is about 631.9032734320.

The spelling of 252320081 in words is "two hundred fifty-two million, three hundred twenty thousand, eighty-one".