225168158 has 4 divisors (see below), whose sum is σ = 337752240. Its totient is φ = 112584078.

The previous prime is 225168149. The next prime is 225168191. The reversal of 225168158 is 851861522.

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

It is a super-2 number, since 2×225168158² = 101401398754225928, which contains 22 as substring.

It is a Curzon number.

It is a congruent number.

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, 56292038 + ... + 56292041.

It is an arithmetic number, because the mean of its divisors is an integer number (84438060).

Almost surely, 2^225168158 is an apocalyptic number.

225168158 is a deficient number, since it is larger than the sum of its proper divisors (112584082).

225168158 is a wasteful number, since it uses less digits than its factorization.

225168158 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 112584081.

The product of its digits is 38400, while the sum is 38.

The square root of 225168158 is about 15005.6042197574. The cubic root of 225168158 is about 608.3716834437.

The spelling of 225168158 in words is "two hundred twenty-five million, one hundred sixty-eight thousand, one hundred fifty-eight".