225884921 has 4 divisors (see below), whose sum is σ = 225939792. Its totient is φ = 225830052.

The previous prime is 225884917. The next prime is 225884927. The reversal of 225884921 is 129488522.

It is a happy number.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 225884921 - 2² = 225884917 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225884927) by changing a digit.

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 3 ways as a sum of consecutive naturals, for example, 20711 + ... + 29676.

It is an arithmetic number, because the mean of its divisors is an integer number (56484948).

Almost surely, 2^225884921 is an apocalyptic number.

It is an amenable number.

225884921 is a deficient number, since it is larger than the sum of its proper divisors (54871).

225884921 is an equidigital number, since it uses as much as digits as its factorization.

225884921 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 54870.

The product of its digits is 92160, while the sum is 41.

The square root of 225884921 is about 15029.4684204066. The cubic root of 225884921 is about 609.0165295614.

The spelling of 225884921 in words is "two hundred twenty-five million, eight hundred eighty-four thousand, nine hundred twenty-one".