252004551245521 has 4 divisors (see below), whose sum is σ = 252730789145712. Its totient is φ = 251278313345332.

The previous prime is 252004551245507. The next prime is 252004551245543. The reversal of 252004551245521 is 125542155400252.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 252004551245521 - 2²¹ = 252004549148369 is a prime.

It is a super-2 number, since 2×252004551245521² (a number of 30 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (252004551245501) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 363118949575 + ... + 363118950268.

It is an arithmetic number, because the mean of its divisors is an integer number (63182697286428).

Almost surely, 2^{252004551245521} is an apocalyptic number.

It is an amenable number.

252004551245521 is a deficient number, since it is larger than the sum of its proper divisors (726237900191).

252004551245521 is an equidigital number, since it uses as much as digits as its factorization.

252004551245521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 726237900190.

The product of its (nonzero) digits is 800000, while the sum is 43.

The spelling of 252004551245521 in words is "two hundred fifty-two trillion, four billion, five hundred fifty-one million, two hundred forty-five thousand, five hundred twenty-one".