225892121 has 16 divisors (see below), whose sum is σ = 292656000. Its totient is φ = 169319808.

The previous prime is 225892091. The next prime is 225892127. The reversal of 225892121 is 121298522.

It is a happy number.

It is not a de Polignac number, because 225892121 - 2¹⁰ = 225891097 is a prime.

It is not an unprimeable number, because it can be changed into a prime (225892127) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 63596 + ... + 67053.

It is an arithmetic number, because the mean of its divisors is an integer number (18291000).

Almost surely, 2^225892121 is an apocalyptic number.

It is an amenable number.

225892121 is a deficient number, since it is larger than the sum of its proper divisors (66763879).

225892121 is a wasteful number, since it uses less digits than its factorization.

225892121 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 130688.

The product of its digits is 5760, while the sum is 32.

The square root of 225892121 is about 15029.7079479277. The cubic root of 225892121 is about 609.0230002197.

The spelling of 225892121 in words is "two hundred twenty-five million, eight hundred ninety-two thousand, one hundred twenty-one".