252133637 has 4 divisors (see below), whose sum is σ = 288152736. Its totient is φ = 216114540.

The previous prime is 252133631. The next prime is 252133649. The reversal of 252133637 is 736331252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252133637 - 2⁴ = 252133621 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252133631) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 18009539 + ... + 18009552.

It is an arithmetic number, because the mean of its divisors is an integer number (72038184).

Almost surely, 2^252133637 is an apocalyptic number.

It is an amenable number.

252133637 is a deficient number, since it is larger than the sum of its proper divisors (36019099).

252133637 is an equidigital number, since it uses as much as digits as its factorization.

252133637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36019098.

The product of its digits is 22680, while the sum is 32.

The square root of 252133637 is about 15878.7164783555. The cubic root of 252133637 is about 631.7475933875.

Adding to 252133637 its reverse (736331252), we get a palindrome (988464889).

The spelling of 252133637 in words is "two hundred fifty-two million, one hundred thirty-three thousand, six hundred thirty-seven".