225281815 has 8 divisors (see below), whose sum is σ = 294914448. Its totient is φ = 163841280.

The previous prime is 225281809. The next prime is 225281897. The reversal of 225281815 is 518182522.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 225281815 - 2⁵ = 225281783 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2047962 + ... + 2048071.

It is an arithmetic number, because the mean of its divisors is an integer number (36864306).

Almost surely, 2^225281815 is an apocalyptic number.

225281815 is a deficient number, since it is larger than the sum of its proper divisors (69632633).

225281815 is a wasteful number, since it uses less digits than its factorization.

225281815 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4096049.

The product of its digits is 12800, while the sum is 34.

The square root of 225281815 is about 15009.3908937038. The cubic root of 225281815 is about 608.4740277986.

The spelling of 225281815 in words is "two hundred twenty-five million, two hundred eighty-one thousand, eight hundred fifteen".