2452221521 has 16 divisors (see below), whose sum is σ = 2647306368. Its totient is φ = 2265648000.

The previous prime is 2452221517. The next prime is 2452221571. The reversal of 2452221521 is 1251222542.

It is a cyclic number.

It is not a de Polignac number, because 2452221521 - 2² = 2452221517 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2452221571) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82370 + ... + 108116.

It is an arithmetic number, because the mean of its divisors is an integer number (165456648).

Almost surely, 2^2452221521 is an apocalyptic number.

It is an amenable number.

2452221521 is a deficient number, since it is larger than the sum of its proper divisors (195084847).

2452221521 is a wasteful number, since it uses less digits than its factorization.

2452221521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25912.

The product of its digits is 3200, while the sum is 26.

The square root of 2452221521 is about 49519.9103492726. The cubic root of 2452221521 is about 1348.5070869191.

The spelling of 2452221521 in words is "two billion, four hundred fifty-two million, two hundred twenty-one thousand, five hundred twenty-one".