225991372 has 6 divisors (see below), whose sum is σ = 395484908. Its totient is φ = 112995684.

The previous prime is 225991357. The next prime is 225991379. The reversal of 225991372 is 273199522.

It is not an unprimeable number, because it can be changed into a prime (225991379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28248918 + ... + 28248925.

Almost surely, 2^225991372 is an apocalyptic number.

It is an amenable number.

225991372 is a deficient number, since it is larger than the sum of its proper divisors (169493536).

225991372 is a wasteful number, since it uses less digits than its factorization.

225991372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56497847 (or 56497845 counting only the distinct ones).

The product of its digits is 68040, while the sum is 40.

The square root of 225991372 is about 15033.0094126226. The cubic root of 225991372 is about 609.1121833379.

The spelling of 225991372 in words is "two hundred twenty-five million, nine hundred ninety-one thousand, three hundred seventy-two".