225172658 has 4 divisors (see below), whose sum is σ = 337758990. Its totient is φ = 112586328.

The previous prime is 225172643. The next prime is 225172681. The reversal of 225172658 is 856271522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 166848889 + 58323769 = 12917^2 + 7637^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 56293163 + ... + 56293166.

Almost surely, 2^225172658 is an apocalyptic number.

225172658 is a deficient number, since it is larger than the sum of its proper divisors (112586332).

225172658 is a wasteful number, since it uses less digits than its factorization.

225172658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112586331.

The product of its digits is 67200, while the sum is 38.

The square root of 225172658 is about 15005.7541629869. The cubic root of 225172658 is about 608.3757361990.

The spelling of 225172658 in words is "two hundred twenty-five million, one hundred seventy-two thousand, six hundred fifty-eight".