225661513 has 12 divisors (see below), whose sum is σ = 286368912. Its totient is φ = 175839720.

The previous prime is 225661511. The next prime is 225661529. The reversal of 225661513 is 315166522.

225661513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 225661513 - 2¹ = 225661511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225661511) 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, 208795 + ... + 209872.

It is an arithmetic number, because the mean of its divisors is an integer number (23864076).

Almost surely, 2^225661513 is an apocalyptic number.

It is an amenable number.

225661513 is a deficient number, since it is larger than the sum of its proper divisors (60707399).

225661513 is a wasteful number, since it uses less digits than its factorization.

225661513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 418692 (or 418685 counting only the distinct ones).

The product of its digits is 10800, while the sum is 31.

The square root of 225661513 is about 15022.0342497280. The cubic root of 225661513 is about 608.8156838614.

The spelling of 225661513 in words is "two hundred twenty-five million, six hundred sixty-one thousand, five hundred thirteen".