225994557 has 16 divisors (see below), whose sum is σ = 319457792. Its totient is φ = 141860160.

The previous prime is 225994547. The next prime is 225994579. The reversal of 225994557 is 755499522.

It is a happy number.

It is not a de Polignac number, because 225994557 - 2⁷ = 225994429 is a prime.

It is a Smith number, since the sum of its digits (48) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225994537) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 29398 + ... + 36279.

It is an arithmetic number, because the mean of its divisors is an integer number (19966112).

Almost surely, 2^225994557 is an apocalyptic number.

It is an amenable number.

225994557 is a deficient number, since it is larger than the sum of its proper divisors (93463235).

225994557 is a wasteful number, since it uses less digits than its factorization.

225994557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65748.

The product of its digits is 1134000, while the sum is 48.

The square root of 225994557 is about 15033.1153457958. The cubic root of 225994557 is about 609.1150448235.

The spelling of 225994557 in words is "two hundred twenty-five million, nine hundred ninety-four thousand, five hundred fifty-seven".