252131356465 has 8 divisors (see below), whose sum is σ = 308266262568. Its totient is φ = 197899328640.

The previous prime is 252131356409. The next prime is 252131356469. The reversal of 252131356465 is 564653131252.

It can be written as a sum of positive squares in 4 ways, for example, as 54010224801 + 198121131664 = 232401^2 + 445108^2 .

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

It is not a de Polignac number, because 252131356465 - 2¹¹ = 252131354417 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252131356469) 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, 475719276 + ... + 475719805.

It is an arithmetic number, because the mean of its divisors is an integer number (38533282821).

Almost surely, 2^252131356465 is an apocalyptic number.

It is an amenable number.

252131356465 is a deficient number, since it is larger than the sum of its proper divisors (56134906103).

252131356465 is an equidigital number, since it uses as much as digits as its factorization.

252131356465 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 951439139.

The product of its digits is 648000, while the sum is 43.

The spelling of 252131356465 in words is "two hundred fifty-two billion, one hundred thirty-one million, three hundred fifty-six thousand, four hundred sixty-five".