252631566 has 48 divisors (see below), whose sum is σ = 600058368. Its totient is φ = 76179600.

The previous prime is 252631559. The next prime is 252631567. The reversal of 252631566 is 665136252.

It is a happy number.

It is a super-2 number, since 2×252631566² = 127645416279224712, which contains 22 as substring.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 252631566.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252631567) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 38755 + ... + 44801.

It is an arithmetic number, because the mean of its divisors is an integer number (12501216).

Almost surely, 2^252631566 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 252631566, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (300029184).

252631566 is an abundant number, since it is smaller than the sum of its proper divisors (347426802).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

252631566 is a wasteful number, since it uses less digits than its factorization.

252631566 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6277 (or 6274 counting only the distinct ones).

The product of its digits is 64800, while the sum is 36.

The square root of 252631566 is about 15894.3878774868. The cubic root of 252631566 is about 632.1631912475.

The spelling of 252631566 in words is "two hundred fifty-two million, six hundred thirty-one thousand, five hundred sixty-six".