225439525 has 12 divisors (see below), whose sum is σ = 286364484. Its totient is φ = 175952000.

The previous prime is 225439481. The next prime is 225439553. The reversal of 225439525 is 525934522.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 25867396 + 199572129 = 5086^2 + 14127^2 .

It is not a de Polignac number, because 225439525 - 2¹¹ = 225437477 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 108946 + ... + 110995.

It is an arithmetic number, because the mean of its divisors is an integer number (23863707).

Almost surely, 2^225439525 is an apocalyptic number.

225439525 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

It is an amenable number.

225439525 is a deficient number, since it is larger than the sum of its proper divisors (60924959).

225439525 is a wasteful number, since it uses less digits than its factorization.

225439525 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 219992 (or 219987 counting only the distinct ones).

The product of its digits is 108000, while the sum is 37.

The square root of 225439525 is about 15014.6436854159. The cubic root of 225439525 is about 608.6159834118.

The spelling of 225439525 in words is "two hundred twenty-five million, four hundred thirty-nine thousand, five hundred twenty-five".