225806990 has 8 divisors (see below), whose sum is σ = 406452600. Its totient is φ = 90322792.

The previous prime is 225806989. The next prime is 225807011. The reversal of 225806990 is 99608522.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11290340 + ... + 11290359.

It is an arithmetic number, because the mean of its divisors is an integer number (50806575).

Almost surely, 2^225806990 is an apocalyptic number.

225806990 is a deficient number, since it is larger than the sum of its proper divisors (180645610).

225806990 is a wasteful number, since it uses less digits than its factorization.

225806990 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22580706.

The product of its (nonzero) digits is 77760, while the sum is 41.

The square root of 225806990 is about 15026.8755900886. The cubic root of 225806990 is about 608.9464839735.

The spelling of 225806990 in words is "two hundred twenty-five million, eight hundred six thousand, nine hundred ninety".