252693621 has 16 divisors (see below), whose sum is σ = 374613120. Its totient is φ = 168348960.

The previous prime is 252693607. The next prime is 252693631. The reversal of 252693621 is 126396252.

252693621 is a `hidden beast` number, since 2 + 5 + 26 + 9 + 3 + 621 = 666.

It is not a de Polignac number, because 252693621 - 2⁵ = 252693589 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252693601) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 62656 + ... + 66566.

It is an arithmetic number, because the mean of its divisors is an integer number (23413320).

Almost surely, 2^252693621 is an apocalyptic number.

It is an amenable number.

252693621 is a deficient number, since it is larger than the sum of its proper divisors (121919499).

252693621 is a wasteful number, since it uses less digits than its factorization.

252693621 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6313 (or 6307 counting only the distinct ones).

The product of its digits is 38880, while the sum is 36.

The square root of 252693621 is about 15896.3398617418. The cubic root of 252693621 is about 632.2149473495.

The spelling of 252693621 in words is "two hundred fifty-two million, six hundred ninety-three thousand, six hundred twenty-one".