2500553221 has 4 divisors (see below), whose sum is σ = 2501195200. Its totient is φ = 2499911244.

The previous prime is 2500553213. The next prime is 2500553227. The reversal of 2500553221 is 1223550052.

It is a happy number.

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 2500553221 - 2³ = 2500553213 is a prime.

It is a super-2 number, since 2×2500553221² = 12505532822106949682, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2500553227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 315111 + ... + 322948.

It is an arithmetic number, because the mean of its divisors is an integer number (625298800).

Almost surely, 2^2500553221 is an apocalyptic number.

It is an amenable number.

2500553221 is a deficient number, since it is larger than the sum of its proper divisors (641979).

2500553221 is an equidigital number, since it uses as much as digits as its factorization.

2500553221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 641978.

The product of its (nonzero) digits is 3000, while the sum is 25.

The square root of 2500553221 is about 50005.5319039804. The cubic root of 2500553221 is about 1357.3089124357.

The spelling of 2500553221 in words is "two billion, five hundred million, five hundred fifty-three thousand, two hundred twenty-one".