225977915 has 4 divisors (see below), whose sum is σ = 271173504. Its totient is φ = 180782328.

The previous prime is 225977911. The next prime is 225977929. The reversal of 225977915 is 519779522.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 225977915 - 2² = 225977911 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225977915.

It is not an unprimeable number, because it can be changed into a prime (225977911) 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, 22597787 + ... + 22597796.

It is an arithmetic number, because the mean of its divisors is an integer number (67793376).

Almost surely, 2^225977915 is an apocalyptic number.

225977915 is a deficient number, since it is larger than the sum of its proper divisors (45195589).

225977915 is an equidigital number, since it uses as much as digits as its factorization.

225977915 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45195588.

The product of its digits is 396900, while the sum is 47.

The square root of 225977915 is about 15032.5618242534. The cubic root of 225977915 is about 609.1000929274.

The spelling of 225977915 in words is "two hundred twenty-five million, nine hundred seventy-seven thousand, nine hundred fifteen".