225915615 has 32 divisors (see below), whose sum is σ = 403185600. Its totient is φ = 120021120.

The previous prime is 225915611. The next prime is 225915623. The reversal of 225915615 is 516519522.

225915615 is a `hidden beast` number, since 2 + 2 + 5 + 91 + 561 + 5 = 666.

It is not a de Polignac number, because 225915615 - 2² = 225915611 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a zygodrome in base 14.

It is a self number, because there is not a number n which added to its sum of digits gives 225915615.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225915611) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 33205 + ... + 39425.

It is an arithmetic number, because the mean of its divisors is an integer number (12599550).

Almost surely, 2^225915615 is an apocalyptic number.

225915615 is a deficient number, since it is larger than the sum of its proper divisors (177269985).

225915615 is a wasteful number, since it uses less digits than its factorization.

225915615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6504 (or 6498 counting only the distinct ones).

The product of its digits is 27000, while the sum is 36.

The square root of 225915615 is about 15030.4895129866. The cubic root of 225915615 is about 609.0441133810.

The spelling of 225915615 in words is "two hundred twenty-five million, nine hundred fifteen thousand, six hundred fifteen".