225719999 has 16 divisors (see below), whose sum is σ = 251045568. Its totient is φ = 201856512.

The previous prime is 225719971. The next prime is 225720037. The reversal of 225719999 is 999917522.

It is a cyclic number.

It is not a de Polignac number, because 225719999 - 2¹⁶ = 225654463 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 225719999.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225719939) 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, 59549 + ... + 63225.

It is an arithmetic number, because the mean of its divisors is an integer number (15690348).

Almost surely, 2^225719999 is an apocalyptic number.

225719999 is a deficient number, since it is larger than the sum of its proper divisors (25325569).

225719999 is a wasteful number, since it uses less digits than its factorization.

225719999 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3874.

The product of its digits is 918540, while the sum is 53.

The square root of 225719999 is about 15023.9807973786. The cubic root of 225719999 is about 608.8682760793.

The spelling of 225719999 in words is "two hundred twenty-five million, seven hundred nineteen thousand, nine hundred ninety-nine".