2253245721 has 16 divisors (see below), whose sum is σ = 3090768000. Its totient is φ = 1459081728.

The previous prime is 2253245653. The next prime is 2253245747. The reversal of 2253245721 is 1275423522.

It is not a de Polignac number, because 2253245721 - 2¹³ = 2253237529 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2253245791) 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, 49545 + ... + 83433.

It is an arithmetic number, because the mean of its divisors is an integer number (193173000).

Almost surely, 2^2253245721 is an apocalyptic number.

It is an amenable number.

2253245721 is a deficient number, since it is larger than the sum of its proper divisors (837522279).

2253245721 is a wasteful number, since it uses less digits than its factorization.

2253245721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34528.

The product of its digits is 33600, while the sum is 33.

The square root of 2253245721 is about 47468.3654763886. The cubic root of 2253245721 is about 1311.0004829171. Note that the first 3 decimals are identical.

The spelling of 2253245721 in words is "two billion, two hundred fifty-three million, two hundred forty-five thousand, seven hundred twenty-one".