252629504021 has 4 divisors (see below), whose sum is σ = 259457328492. Its totient is φ = 245801679552.

The previous prime is 252629503991. The next prime is 252629504047. The reversal of 252629504021 is 120405926252.

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 105241848100 + 147387655921 = 324410^2 + 383911^2 .

It is a cyclic number.

It is not a de Polignac number, because 252629504021 - 2²⁶ = 252562395157 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (252629504081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3413912180 + ... + 3413912253.

It is an arithmetic number, because the mean of its divisors is an integer number (64864332123).

Almost surely, 2^252629504021 is an apocalyptic number.

It is an amenable number.

252629504021 is a deficient number, since it is larger than the sum of its proper divisors (6827824471).

252629504021 is an equidigital number, since it uses as much as digits as its factorization.

252629504021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6827824470.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 252629504021 in words is "two hundred fifty-two billion, six hundred twenty-nine million, five hundred four thousand, twenty-one".