225123999 has 16 divisors (see below), whose sum is σ = 306983040. Its totient is φ = 146702880.

The previous prime is 225123961. The next prime is 225124001. The reversal of 225123999 is 999321522.

It is not a de Polignac number, because 225123999 - 2¹⁵ = 225091231 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225123999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225123919) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 28524 + ... + 35550.

It is an arithmetic number, because the mean of its divisors is an integer number (19186440).

Almost surely, 2^225123999 is an apocalyptic number.

225123999 is a deficient number, since it is larger than the sum of its proper divisors (81859041).

225123999 is a wasteful number, since it uses less digits than its factorization.

225123999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7270.

The product of its digits is 87480, while the sum is 42.

The square root of 225123999 is about 15004.1327306846. The cubic root of 225123999 is about 608.3319104406.

The spelling of 225123999 in words is "two hundred twenty-five million, one hundred twenty-three thousand, nine hundred ninety-nine".