2225152521 has 12 divisors (see below), whose sum is σ = 3214518580. Its totient is φ = 1483246080.

The previous prime is 2225152499. The next prime is 2225152541. The reversal of 2225152521 is 1252515222.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 924828921 + 1300323600 = 30411^2 + 36060^2 .

It is a de Polignac number, because none of the positive numbers 2^k-2225152521 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2225152541) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 126081 + ... + 142641.

Almost surely, 2^2225152521 is an apocalyptic number.

It is an amenable number.

2225152521 is a deficient number, since it is larger than the sum of its proper divisors (989366059).

2225152521 is a wasteful number, since it uses less digits than its factorization.

2225152521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31496 (or 31493 counting only the distinct ones).

The product of its digits is 4000, while the sum is 27.

The square root of 2225152521 is about 47171.5223519445. The cubic root of 2225152521 is about 1305.5292150503.

Adding to 2225152521 its reverse (1252515222), we get a palindrome (3477667743).

The spelling of 2225152521 in words is "two billion, two hundred twenty-five million, one hundred fifty-two thousand, five hundred twenty-one".