225528291 has 12 divisors (see below), whose sum is σ = 325918632. Its totient is φ = 150280416.

The previous prime is 225528263. The next prime is 225528301. The reversal of 225528291 is 192825522.

225528291 is a `hidden beast` number, since 22 + 552 + 82 + 9 + 1 = 666.

It is not a de Polignac number, because 225528291 - 2⁹ = 225527779 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225528211) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 19735 + ... + 28991.

It is an arithmetic number, because the mean of its divisors is an integer number (27159886).

Almost surely, 2^225528291 is an apocalyptic number.

225528291 is a deficient number, since it is larger than the sum of its proper divisors (100390341).

225528291 is a wasteful number, since it uses less digits than its factorization.

225528291 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11970 (or 11967 counting only the distinct ones).

The product of its digits is 28800, while the sum is 36.

The square root of 225528291 is about 15017.5993753995. The cubic root of 225528291 is about 608.6958530461.

The spelling of 225528291 in words is "two hundred twenty-five million, five hundred twenty-eight thousand, two hundred ninety-one".