252797621 has 4 divisors (see below), whose sum is σ = 253110144. Its totient is φ = 252485100.

The previous prime is 252797593. The next prime is 252797663. The reversal of 252797621 is 126797252.

252797621 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 252797621 - 2⁶ = 252797557 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 (252797221) 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, 155045 + ... + 156666.

It is an arithmetic number, because the mean of its divisors is an integer number (63277536).

Almost surely, 2^252797621 is an apocalyptic number.

It is an amenable number.

252797621 is a deficient number, since it is larger than the sum of its proper divisors (312523).

252797621 is an equidigital number, since it uses as much as digits as its factorization.

252797621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 312522.

The product of its digits is 105840, while the sum is 41.

The square root of 252797621 is about 15899.6107185050. The cubic root of 252797621 is about 632.3016680934.

The spelling of 252797621 in words is "two hundred fifty-two million, seven hundred ninety-seven thousand, six hundred twenty-one".