252404505521 has 8 divisors (see below), whose sum is σ = 303644518080. Its totient is φ = 204960049488.

The previous prime is 252404505499. The next prime is 252404505527. The reversal of 252404505521 is 125505404252.

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

It is a cyclic number.

It is not a de Polignac number, because 252404505521 - 2¹⁰ = 252404504497 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (252404505527) 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, 948888986 + ... + 948889251.

It is an arithmetic number, because the mean of its divisors is an integer number (37955564760).

Almost surely, 2^252404505521 is an apocalyptic number.

It is an amenable number.

252404505521 is a deficient number, since it is larger than the sum of its proper divisors (51240012559).

252404505521 is a wasteful number, since it uses less digits than its factorization.

252404505521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1897778263.

The product of its (nonzero) digits is 80000, while the sum is 35.

Adding to 252404505521 its reverse (125505404252), we get a palindrome (377909909773).

The spelling of 252404505521 in words is "two hundred fifty-two billion, four hundred four million, five hundred five thousand, five hundred twenty-one".