252252716781 has 32 divisors (see below), whose sum is σ = 363798787968. Its totient is φ = 154552043520.

The previous prime is 252252716773. The next prime is 252252716783. The reversal of 252252716781 is 187617252252.

It is not a de Polignac number, because 252252716781 - 2³ = 252252716773 is a prime.

It is a super-2 number, since 2×252252716781² (a number of 24 digits) 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 252252716781.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252252716783) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 14204950 + ... + 14222696.

It is an arithmetic number, because the mean of its divisors is an integer number (11368712124).

Almost surely, 2^252252716781 is an apocalyptic number.

It is an amenable number.

252252716781 is a deficient number, since it is larger than the sum of its proper divisors (111546071187).

252252716781 is a wasteful number, since it uses less digits than its factorization.

252252716781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19341.

The product of its digits is 940800, while the sum is 48.

The spelling of 252252716781 in words is "two hundred fifty-two billion, two hundred fifty-two million, seven hundred sixteen thousand, seven hundred eighty-one".