225831249 has 36 divisors (see below), whose sum is σ = 391722240. Its totient is φ = 124876080.

The previous prime is 225831197. The next prime is 225831299. The reversal of 225831249 is 942138522.

It is a happy number.

225831249 is a `hidden beast` number, since 22 + 583 + 12 + 49 = 666.

It is not a de Polignac number, because 225831249 - 2¹² = 225827153 is a prime.

It is a hoax number, since the sum of its digits (36) coincides with the sum of the digits of its distinct prime factors.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (225831299) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 5412 + ... + 21930.

Almost surely, 2^225831249 is an apocalyptic number.

It is an amenable number.

225831249 is a deficient number, since it is larger than the sum of its proper divisors (165890991).

225831249 is a wasteful number, since it uses less digits than its factorization.

225831249 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16570 (or 16560 counting only the distinct ones).

The product of its digits is 34560, while the sum is 36.

The square root of 225831249 is about 15027.6827555016. The cubic root of 225831249 is about 608.9682900651.

It can be divided in two parts, 22583 and 1249, that added together give a palindrome (23832).

The spelling of 225831249 in words is "two hundred twenty-five million, eight hundred thirty-one thousand, two hundred forty-nine".