2533865221 has 2 divisors, whose sum is σ = 2533865222. Its totient is φ = 2533865220.

The previous prime is 2533865179. The next prime is 2533865261. The reversal of 2533865221 is 1225683352.

2533865221 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 2511112321 + 22752900 = 50111^2 + 4770^2 .

It is a cyclic number.

It is not a de Polignac number, because 2533865221 - 2⁷ = 2533865093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2533865261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1266932610 + 1266932611.

It is an arithmetic number, because the mean of its divisors is an integer number (1266932611).

Almost surely, 2^2533865221 is an apocalyptic number.

It is an amenable number.

2533865221 is a deficient number, since it is larger than the sum of its proper divisors (1).

2533865221 is an equidigital number, since it uses as much as digits as its factorization.

2533865221 is an evil number, because the sum of its binary digits is even.

The product of its digits is 86400, while the sum is 37.

The square root of 2533865221 is about 50337.5130593477. The cubic root of 2533865221 is about 1363.3096333911.

The spelling of 2533865221 in words is "two billion, five hundred thirty-three million, eight hundred sixty-five thousand, two hundred twenty-one".