252535221 has 12 divisors (see below), whose sum is σ = 386230572. Its totient is φ = 158453376.

The previous prime is 252535177. The next prime is 252535223. The reversal of 252535221 is 122535252.

It can be written as a sum of positive squares in 2 ways, for example, as 77264100 + 175271121 = 8790^2 + 13239^2 .

It is not a de Polignac number, because 252535221 - 2⁷ = 252535093 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252535223) 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, 825126 + ... + 825431.

It is an arithmetic number, because the mean of its divisors is an integer number (32185881).

Almost surely, 2^252535221 is an apocalyptic number.

It is an amenable number.

252535221 is a deficient number, since it is larger than the sum of its proper divisors (133695351).

252535221 is a wasteful number, since it uses less digits than its factorization.

252535221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1650580 (or 1650577 counting only the distinct ones).

The product of its digits is 6000, while the sum is 27.

The square root of 252535221 is about 15891.3568017335. The cubic root of 252535221 is about 632.0828192553.

The spelling of 252535221 in words is "two hundred fifty-two million, five hundred thirty-five thousand, two hundred twenty-one".