252536921 has 16 divisors (see below), whose sum is σ = 329099904. Its totient is φ = 188054784.

The previous prime is 252536909. The next prime is 252536929. The reversal of 252536921 is 129635252.

252536921 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 252536921 - 2¹⁴ = 252520537 is a prime.

It is not an unprimeable number, because it can be changed into a prime (252536929) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 80075 + ... + 83168.

It is an arithmetic number, because the mean of its divisors is an integer number (20568744).

Almost surely, 2^252536921 is an apocalyptic number.

It is an amenable number.

252536921 is a deficient number, since it is larger than the sum of its proper divisors (76562983).

252536921 is a wasteful number, since it uses less digits than its factorization.

252536921 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 163280.

The product of its digits is 32400, while the sum is 35.

The square root of 252536921 is about 15891.4102898390. The cubic root of 252536921 is about 632.0842375900.

The spelling of 252536921 in words is "two hundred fifty-two million, five hundred thirty-six thousand, nine hundred twenty-one".