2276721225 has 27 divisors (see below), whose sum is σ = 4079143029. Its totient is φ = 1213869600.

The previous prime is 2276721199. The next prime is 2276721233. The reversal of 2276721225 is 5221276722.

The square root of 2276721225 is 47715.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 835152201 + 1441569024 = 28899^2 + 37968^2 .

It is not a de Polignac number, because 2276721225 - 2⁹ = 2276720713 is a prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 2276721225.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 714135 + ... + 717315.

Almost surely, 2^2276721225 is an apocalyptic number.

2276721225 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

2276721225 is the 47715-th square number.

2276721225 is the 23858-th centered octagonal number.

It is an amenable number.

2276721225 is a deficient number, since it is larger than the sum of its proper divisors (1802421804).

2276721225 is an frugal number, since it uses more digits than its factorization.

2276721225 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6378 (or 3189 counting only the distinct ones).

The product of its digits is 47040, while the sum is 36.

The cubic root of 2276721225 is about 1315.5376607878.

Multiplying 2276721225 by its sum of digits (36), we get a square (81961964100 = 286290²).

Adding to 2276721225 its reverse (5221276722), we get a palindrome (7497997947).

The spelling of 2276721225 in words is "two billion, two hundred seventy-six million, seven hundred twenty-one thousand, two hundred twenty-five".