225915558 has 64 divisors (see below), whose sum is σ = 511377408. Its totient is φ = 65941920.

The previous prime is 225915541. The next prime is 225915563. The reversal of 225915558 is 855519522.

It is a super-3 number, since 3×225915558³ (a number of 26 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 207291 + ... + 208377.

It is an arithmetic number, because the mean of its divisors is an integer number (7990272).

Almost surely, 2^225915558 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 225915558, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (255688704).

225915558 is an abundant number, since it is smaller than the sum of its proper divisors (285461850).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

225915558 is a wasteful number, since it uses less digits than its factorization.

225915558 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1217.

The product of its digits is 180000, while the sum is 42.

The square root of 225915558 is about 15030.4876168406. The cubic root of 225915558 is about 609.0440621591.

The spelling of 225915558 in words is "two hundred twenty-five million, nine hundred fifteen thousand, five hundred fifty-eight".