225478919 has 8 divisors (see below), whose sum is σ = 231421680. Its totient is φ = 219612096.

The previous prime is 225478861. The next prime is 225478921. The reversal of 225478919 is 919874522.

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

It is a cyclic number.

It is not a de Polignac number, because 225478919 - 2⁸ = 225478663 is a prime.

It is a super-2 number, since 2×225478919² = 101681485826817122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225408919) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12944 + ... + 24869.

It is an arithmetic number, because the mean of its divisors is an integer number (28927710).

Almost surely, 2^225478919 is an apocalyptic number.

225478919 is a deficient number, since it is larger than the sum of its proper divisors (5942761).

225478919 is an equidigital number, since it uses as much as digits as its factorization.

225478919 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 37969.

The product of its digits is 362880, while the sum is 47.

The square root of 225478919 is about 15015.9554807545. The cubic root of 225478919 is about 608.6514318270.

The spelling of 225478919 in words is "two hundred twenty-five million, four hundred seventy-eight thousand, nine hundred nineteen".