225890439 has 16 divisors (see below), whose sum is σ = 312405600. Its totient is φ = 145065600.

The previous prime is 225890419. The next prime is 225890447. The reversal of 225890439 is 934098522.

It is not a de Polignac number, because 225890439 - 2¹⁶ = 225824903 is a prime.

It is a super-2 number, since 2×225890439² = 102052980863225442, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 225890439.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225890419) 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, 1137 + ... + 21285.

It is an arithmetic number, because the mean of its divisors is an integer number (19525350).

Almost surely, 2^225890439 is an apocalyptic number.

225890439 is a deficient number, since it is larger than the sum of its proper divisors (86515161).

225890439 is a wasteful number, since it uses less digits than its factorization.

225890439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20290.

The product of its (nonzero) digits is 155520, while the sum is 42.

The square root of 225890439 is about 15029.6519919791. The cubic root of 225890439 is about 609.0214886144.

The spelling of 225890439 in words is "two hundred twenty-five million, eight hundred ninety thousand, four hundred thirty-nine".