252005636 has 24 divisors (see below), whose sum is σ = 452120760. Its totient is φ = 122867712.

The previous prime is 252005599. The next prime is 252005647. The reversal of 252005636 is 636500252.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 592900 + 251412736 = 770^2 + 15856^2 .

It is a junction number, because it is equal to n+sod(n) for n = 252005599 and 252005608.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21140 + ... + 30836.

It is an arithmetic number, because the mean of its divisors is an integer number (18838365).

Almost surely, 2^252005636 is an apocalyptic number.

It is an amenable number.

252005636 is a deficient number, since it is larger than the sum of its proper divisors (200115124).

252005636 is a wasteful number, since it uses less digits than its factorization.

252005636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9863 (or 9861 counting only the distinct ones).

The product of its (nonzero) digits is 10800, while the sum is 29.

The square root of 252005636 is about 15874.6853827092. The cubic root of 252005636 is about 631.6406685933.

Adding to 252005636 its reverse (636500252), we get a palindrome (888505888).

The spelling of 252005636 in words is "two hundred fifty-two million, five thousand, six hundred thirty-six".