225124979 has 2 divisors, whose sum is σ = 225124980. Its totient is φ = 225124978.

The previous prime is 225124873. The next prime is 225124997. The reversal of 225124979 is 979421522.

Together with next prime (225124997) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-225124979 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225124379) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112562489 + 112562490.

It is an arithmetic number, because the mean of its divisors is an integer number (112562490).

Almost surely, 2^225124979 is an apocalyptic number.

225124979 is a deficient number, since it is larger than the sum of its proper divisors (1).

225124979 is an equidigital number, since it uses as much as digits as its factorization.

225124979 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 90720, while the sum is 41.

The square root of 225124979 is about 15004.1653883180. The cubic root of 225124979 is about 608.3327931606.

The spelling of 225124979 in words is "two hundred twenty-five million, one hundred twenty-four thousand, nine hundred seventy-nine".