225805513 has 16 divisors (see below), whose sum is σ = 249448320. Its totient is φ = 203664384.

The previous prime is 225805511. The next prime is 225805523. The reversal of 225805513 is 315508522.

225805513 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 225805513 - 2¹ = 225805511 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225805511) 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, 24745 + ... + 32617.

It is an arithmetic number, because the mean of its divisors is an integer number (15590520).

Almost surely, 2^225805513 is an apocalyptic number.

225805513 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

It is an amenable number.

225805513 is a deficient number, since it is larger than the sum of its proper divisors (23642807).

225805513 is a wasteful number, since it uses less digits than its factorization.

225805513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7968.

The product of its (nonzero) digits is 12000, while the sum is 31.

The square root of 225805513 is about 15026.8264447288. The cubic root of 225805513 is about 608.9451562674.

The spelling of 225805513 in words is "two hundred twenty-five million, eight hundred five thousand, five hundred thirteen".