225547919 has 2 divisors, whose sum is σ = 225547920. Its totient is φ = 225547918.

The previous prime is 225547873. The next prime is 225547921. The reversal of 225547919 is 919745522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225547919 - 2²⁴ = 208770703 is a prime.

It is a super-2 number, since 2×225547919² = 101743727530461122, which contains 22 as substring.

Together with 225547921, it forms a pair of twin primes.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 225547919.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225547939) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112773959 + 112773960.

It is an arithmetic number, because the mean of its divisors is an integer number (112773960).

Almost surely, 2^225547919 is an apocalyptic number.

225547919 is a deficient number, since it is larger than the sum of its proper divisors (1).

225547919 is an equidigital number, since it uses as much as digits as its factorization.

225547919 is an evil number, because the sum of its binary digits is even.

The product of its digits is 226800, while the sum is 44.

The square root of 225547919 is about 15018.2528611021. The cubic root of 225547919 is about 608.7135110460.

The spelling of 225547919 in words is "two hundred twenty-five million, five hundred forty-seven thousand, nine hundred nineteen".