225983999 has 4 divisors (see below), whose sum is σ = 226506336. Its totient is φ = 225461664.

The previous prime is 225983987. The next prime is 225984023. The reversal of 225983999 is 999389522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 999389522 = 2 ⋅499694761.

It is a cyclic number.

It is not a de Polignac number, because 225983999 - 2¹² = 225979903 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 (225983939) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 260519 + ... + 261384.

It is an arithmetic number, because the mean of its divisors is an integer number (56626584).

Almost surely, 2^225983999 is an apocalyptic number.

225983999 is a deficient number, since it is larger than the sum of its proper divisors (522337).

225983999 is an equidigital number, since it uses as much as digits as its factorization.

225983999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 522336.

The product of its digits is 3149280, while the sum is 56.

The square root of 225983999 is about 15032.7641836091. The cubic root of 225983999 is about 609.1055591426.

The spelling of 225983999 in words is "two hundred twenty-five million, nine hundred eighty-three thousand, nine hundred ninety-nine".