225671819 has 2 divisors, whose sum is σ = 225671820. Its totient is φ = 225671818.

The previous prime is 225671813. The next prime is 225671851. The reversal of 225671819 is 918176522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225671819 - 2²⁴ = 208894603 is a prime.

It is a super-2 number, since 2×225671819² = 101855539781537522, which contains 22 as substring.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (225671813) 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, 112835909 + 112835910.

It is an arithmetic number, because the mean of its divisors is an integer number (112835910).

Almost surely, 2^225671819 is an apocalyptic number.

225671819 is a deficient number, since it is larger than the sum of its proper divisors (1).

225671819 is an equidigital number, since it uses as much as digits as its factorization.

225671819 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 60480, while the sum is 41.

The square root of 225671819 is about 15022.3772752517. The cubic root of 225671819 is about 608.8249519592.

The spelling of 225671819 in words is "two hundred twenty-five million, six hundred seventy-one thousand, eight hundred nineteen".