225649513 has 4 divisors (see below), whose sum is σ = 226795140. Its totient is φ = 224503888.

The previous prime is 225649507. The next prime is 225649531. The reversal of 225649513 is 315946522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 223711849 + 1937664 = 14957^2 + 1392^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225649513 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225649013) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 572518 + ... + 572911.

It is an arithmetic number, because the mean of its divisors is an integer number (56698785).

Almost surely, 2^225649513 is an apocalyptic number.

It is an amenable number.

225649513 is a deficient number, since it is larger than the sum of its proper divisors (1145627).

225649513 is a wasteful number, since it uses less digits than its factorization.

225649513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1145626.

The product of its digits is 64800, while the sum is 37.

The square root of 225649513 is about 15021.6348311361. The cubic root of 225649513 is about 608.8048920083.

The spelling of 225649513 in words is "two hundred twenty-five million, six hundred forty-nine thousand, five hundred thirteen".