225974820979 has 2 divisors, whose sum is σ = 225974820980. Its totient is φ = 225974820978.

The previous prime is 225974820811. The next prime is 225974820997. The reversal of 225974820979 is 979028479522.

Together with next prime (225974820997) 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 not a de Polignac number, because 225974820979 - 2¹³ = 225974812787 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225974820979.

It is not a weakly prime, because it can be changed into another prime (225974820779) 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 as a sum of consecutive naturals, namely, 112987410489 + 112987410490.

It is an arithmetic number, because the mean of its divisors is an integer number (112987410490).

Almost surely, 2^225974820979 is an apocalyptic number.

225974820979 is a deficient number, since it is larger than the sum of its proper divisors (1).

225974820979 is an equidigital number, since it uses as much as digits as its factorization.

225974820979 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 45722880, while the sum is 64.

The spelling of 225974820979 in words is "two hundred twenty-five billion, nine hundred seventy-four million, eight hundred twenty thousand, nine hundred seventy-nine".