2421664225 has 6 divisors (see below), whose sum is σ = 3002863670. Its totient is φ = 1937331360.

The previous prime is 2421664211. The next prime is 2421664243. The reversal of 2421664225 is 5224661242.

It can be written as a sum of positive squares in 3 ways, for example, as 267126336 + 2154537889 = 16344^2 + 46417^2 .

It is not a de Polignac number, because 2421664225 - 2²³ = 2413275617 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 48433260 + ... + 48433309.

Almost surely, 2^2421664225 is an apocalyptic number.

2421664225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

2421664225 is a deficient number, since it is larger than the sum of its proper divisors (581199445).

2421664225 is an equidigital number, since it uses as much as digits as its factorization.

2421664225 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 96866579 (or 96866574 counting only the distinct ones).

The product of its digits is 46080, while the sum is 34.

The square root of 2421664225 is about 49210.4076898373. The cubic root of 2421664225 is about 1342.8823796023.

The spelling of 2421664225 in words is "two billion, four hundred twenty-one million, six hundred sixty-four thousand, two hundred twenty-five".