252061621 has 12 divisors (see below), whose sum is σ = 291638752. Its totient is φ = 213408936.

The previous prime is 252061613. The next prime is 252061631. The reversal of 252061621 is 126160252.

It is not a de Polignac number, because 252061621 - 2³ = 252061613 is a prime.

It is a super-2 number, since 2×252061621² = 127070121562295282, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252061631) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 45610 + ... + 50836.

Almost surely, 2^252061621 is an apocalyptic number.

It is an amenable number.

252061621 is a deficient number, since it is larger than the sum of its proper divisors (39577131).

252061621 is an frugal number, since it uses more digits than its factorization.

252061621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5400 (or 5317 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 25.

The square root of 252061621 is about 15876.4486268183. The cubic root of 252061621 is about 631.6874397490.

The spelling of 252061621 in words is "two hundred fifty-two million, sixty-one thousand, six hundred twenty-one".