252287687 has 4 divisors (see below), whose sum is σ = 252695880. Its totient is φ = 251879496.

The previous prime is 252287671. The next prime is 252287689. The reversal of 252287687 is 786782252.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 252287687 - 2⁴ = 252287671 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 (252287689) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 203168 + ... + 204405.

It is an arithmetic number, because the mean of its divisors is an integer number (63173970).

Almost surely, 2^252287687 is an apocalyptic number.

252287687 is a deficient number, since it is larger than the sum of its proper divisors (408193).

252287687 is an equidigital number, since it uses as much as digits as its factorization.

252287687 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 408192.

The product of its digits is 752640, while the sum is 47.

The square root of 252287687 is about 15883.5665705156. The cubic root of 252287687 is about 631.8762300689.

It can be divided in two parts, 2522 and 87687, that added together give a palindrome (90209).

The spelling of 252287687 in words is "two hundred fifty-two million, two hundred eighty-seven thousand, six hundred eighty-seven".