225223279 has 2 divisors, whose sum is σ = 225223280. Its totient is φ = 225223278.

The previous prime is 225223253. The next prime is 225223301. The reversal of 225223279 is 972322522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225223279 - 2¹⁷ = 225092207 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225223079) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112611639 + 112611640.

It is an arithmetic number, because the mean of its divisors is an integer number (112611640).

Almost surely, 2^225223279 is an apocalyptic number.

225223279 is a deficient number, since it is larger than the sum of its proper divisors (1).

225223279 is an equidigital number, since it uses as much as digits as its factorization.

225223279 is an evil number, because the sum of its binary digits is even.

The product of its digits is 30240, while the sum is 34.

The square root of 225223279 is about 15007.4407878226. The cubic root of 225223279 is about 608.4213223741.

The spelling of 225223279 in words is "two hundred twenty-five million, two hundred twenty-three thousand, two hundred seventy-nine".