252156621 has 8 divisors (see below), whose sum is σ = 336285504. Its totient is φ = 168066080.

The previous prime is 252156587. The next prime is 252156629. The reversal of 252156621 is 126651252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 252156621 - 2¹⁸ = 251894477 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252156629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14185 + ... + 26561.

It is an arithmetic number, because the mean of its divisors is an integer number (42035688).

Almost surely, 2^252156621 is an apocalyptic number.

It is an amenable number.

252156621 is a deficient number, since it is larger than the sum of its proper divisors (84128883).

252156621 is a wasteful number, since it uses less digits than its factorization.

252156621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19171.

The product of its digits is 7200, while the sum is 30.

The square root of 252156621 is about 15879.4401979415. The cubic root of 252156621 is about 631.7667890882.

The spelling of 252156621 in words is "two hundred fifty-two million, one hundred fifty-six thousand, six hundred twenty-one".