2245266721 has 24 divisors (see below), whose sum is σ = 2425361400. Its totient is φ = 2077888512.

The previous prime is 2245266701. The next prime is 2245266733. The reversal of 2245266721 is 1276625422.

It can be written as a sum of positive squares in 12 ways, for example, as 876096 + 2244390625 = 936^2 + 47375^2 .

It is not a de Polignac number, because 2245266721 - 2⁹ = 2245266209 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2245266701) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 6433255 + ... + 6433603.

It is an arithmetic number, because the mean of its divisors is an integer number (101056725).

Almost surely, 2^2245266721 is an apocalyptic number.

It is an amenable number.

2245266721 is a deficient number, since it is larger than the sum of its proper divisors (180094679).

2245266721 is a wasteful number, since it uses less digits than its factorization.

2245266721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 693 (or 676 counting only the distinct ones).

The product of its digits is 80640, while the sum is 37.

The square root of 2245266721 is about 47384.2454936237. The cubic root of 2245266721 is about 1309.4511853348.

The spelling of 2245266721 in words is "two billion, two hundred forty-five million, two hundred sixty-six thousand, seven hundred twenty-one".