225291779 has 4 divisors (see below), whose sum is σ = 231380784. Its totient is φ = 219202776.

The previous prime is 225291763. The next prime is 225291793. The reversal of 225291779 is 977192522.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 977192522 = 2 ⋅488596261.

It is a cyclic number.

It is not a de Polignac number, because 225291779 - 2⁴ = 225291763 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (225291709) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3044447 + ... + 3044520.

It is an arithmetic number, because the mean of its divisors is an integer number (57845196).

Almost surely, 2^225291779 is an apocalyptic number.

225291779 is a deficient number, since it is larger than the sum of its proper divisors (6089005).

225291779 is an equidigital number, since it uses as much as digits as its factorization.

225291779 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6089004.

The product of its digits is 158760, while the sum is 44.

The square root of 225291779 is about 15009.7228155619. The cubic root of 225291779 is about 608.4829984085.

The spelling of 225291779 in words is "two hundred twenty-five million, two hundred ninety-one thousand, seven hundred seventy-nine".