252920813 has 4 divisors (see below), whose sum is σ = 253049088. Its totient is φ = 252792540.

The previous prime is 252920809. The next prime is 252920819. The reversal of 252920813 is 318029252.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252920813 - 2² = 252920809 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 252920813.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252920819) 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, 61133 + ... + 65138.

It is an arithmetic number, because the mean of its divisors is an integer number (63262272).

Almost surely, 2^252920813 is an apocalyptic number.

It is an amenable number.

252920813 is a deficient number, since it is larger than the sum of its proper divisors (128275).

252920813 is a wasteful number, since it uses less digits than its factorization.

252920813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128274.

The product of its (nonzero) digits is 8640, while the sum is 32.

The square root of 252920813 is about 15903.4843037619. The cubic root of 252920813 is about 632.4043613825.

The spelling of 252920813 in words is "two hundred fifty-two million, nine hundred twenty thousand, eight hundred thirteen".