225990173 has 8 divisors (see below), whose sum is σ = 227421792. Its totient is φ = 224563536.

The previous prime is 225990151. The next prime is 225990181. The reversal of 225990173 is 371099522.

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 225990173 - 2⁸ = 225989917 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225990103) 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, 128486 + ... + 130232.

It is an arithmetic number, because the mean of its divisors is an integer number (28427724).

Almost surely, 2^225990173 is an apocalyptic number.

It is an amenable number.

225990173 is a deficient number, since it is larger than the sum of its proper divisors (1431619).

225990173 is a wasteful number, since it uses less digits than its factorization.

225990173 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2491.

The product of its (nonzero) digits is 34020, while the sum is 38.

The square root of 225990173 is about 15032.9695336617. The cubic root of 225990173 is about 609.1111061186. Note that the first 4 decimals are identical.

The spelling of 225990173 in words is "two hundred twenty-five million, nine hundred ninety thousand, one hundred seventy-three".