225891751 has 2 divisors, whose sum is σ = 225891752. Its totient is φ = 225891750.

The previous prime is 225891749. The next prime is 225891781. The reversal of 225891751 is 157198522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225891751 - 2¹ = 225891749 is a prime.

Together with 225891749, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225891781) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112945875 + 112945876.

It is an arithmetic number, because the mean of its divisors is an integer number (112945876).

Almost surely, 2^225891751 is an apocalyptic number.

225891751 is a deficient number, since it is larger than the sum of its proper divisors (1).

225891751 is an equidigital number, since it uses as much as digits as its factorization.

225891751 is an evil number, because the sum of its binary digits is even.

The product of its digits is 50400, while the sum is 40.

The square root of 225891751 is about 15029.6956389675. The cubic root of 225891751 is about 609.0226677031.

The spelling of 225891751 in words is "two hundred twenty-five million, eight hundred ninety-one thousand, seven hundred fifty-one".