252968813 has 4 divisors (see below), whose sum is σ = 257256480. Its totient is φ = 248681148.

The previous prime is 252968809. The next prime is 252968843. The reversal of 252968813 is 318869252.

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 252968813 - 2² = 252968809 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252968803) 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, 2143745 + ... + 2143862.

It is an arithmetic number, because the mean of its divisors is an integer number (64314120).

Almost surely, 2^252968813 is an apocalyptic number.

It is an amenable number.

252968813 is a deficient number, since it is larger than the sum of its proper divisors (4287667).

252968813 is an equidigital number, since it uses as much as digits as its factorization.

252968813 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4287666.

The product of its digits is 207360, while the sum is 44.

The square root of 252968813 is about 15904.9933354277. The cubic root of 252968813 is about 632.4443653253. Note that the first 3 decimals are identical.

The spelling of 252968813 in words is "two hundred fifty-two million, nine hundred sixty-eight thousand, eight hundred thirteen".