252239491765 has 4 divisors (see below), whose sum is σ = 302687390124. Its totient is φ = 201791593408.

The previous prime is 252239491753. The next prime is 252239491783. The reversal of 252239491765 is 567194932252.

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

It can be written as a sum of positive squares in 2 ways, for example, as 54714355921 + 197525135844 = 233911^2 + 444438^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-252239491765 is a prime.

It is a super-2 number, since 2×252239491765² (a number of 24 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25223949172 + ... + 25223949181.

It is an arithmetic number, because the mean of its divisors is an integer number (75671847531).

Almost surely, 2^252239491765 is an apocalyptic number.

It is an amenable number.

252239491765 is a deficient number, since it is larger than the sum of its proper divisors (50447898359).

252239491765 is an equidigital number, since it uses as much as digits as its factorization.

252239491765 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50447898358.

The product of its digits is 8164800, while the sum is 55.

The spelling of 252239491765 in words is "two hundred fifty-two billion, two hundred thirty-nine million, four hundred ninety-one thousand, seven hundred sixty-five".