252537639 has 8 divisors (see below), whose sum is σ = 336871920. Its totient is φ = 168280896.

The previous prime is 252537629. The next prime is 252537643. The reversal of 252537639 is 936735252.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 252537639 - 2¹² = 252533543 is a prime.

It is a super-2 number, since 2×252537639² = 127550518223388642, which contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a self number, because there is not a number n which added to its sum of digits gives 252537639.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252537629) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 11302 + ... + 25155.

It is an arithmetic number, because the mean of its divisors is an integer number (42108990).

Almost surely, 2^252537639 is an apocalyptic number.

252537639 is a deficient number, since it is larger than the sum of its proper divisors (84334281).

252537639 is a wasteful number, since it uses less digits than its factorization.

252537639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 38769.

The product of its digits is 340200, while the sum is 42.

The square root of 252537639 is about 15891.4328806436. The cubic root of 252537639 is about 632.0848366259.

The spelling of 252537639 in words is "two hundred fifty-two million, five hundred thirty-seven thousand, six hundred thirty-nine".