252523809 has 12 divisors (see below), whose sum is σ = 372518016. Its totient is φ = 164767032.

The previous prime is 252523807. The next prime is 252523811. The reversal of 252523809 is 908325252.

252523809 is a `hidden beast` number, since 2 + 52 + 523 + 80 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (252523807) and next prime (252523811).

It is not a de Polignac number, because 252523809 - 2¹ = 252523807 is a prime.

It is a super-2 number, since 2×252523809² = 127536548223736962, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252523807) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 298069 + ... + 298914.

It is an arithmetic number, because the mean of its divisors is an integer number (31043168).

Almost surely, 2^252523809 is an apocalyptic number.

It is an amenable number.

252523809 is a deficient number, since it is larger than the sum of its proper divisors (119994207).

252523809 is a wasteful number, since it uses less digits than its factorization.

252523809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 597036 (or 597033 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 36.

The square root of 252523809 is about 15890.9977345666. The cubic root of 252523809 is about 632.0732978933.

The spelling of 252523809 in words is "two hundred fifty-two million, five hundred twenty-three thousand, eight hundred nine".