225892391 has 2 divisors, whose sum is σ = 225892392. Its totient is φ = 225892390.

The previous prime is 225892369. The next prime is 225892399. The reversal of 225892391 is 193298522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 225892391 - 2¹⁸ = 225630247 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225892399) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112946195 + 112946196.

It is an arithmetic number, because the mean of its divisors is an integer number (112946196).

Almost surely, 2^225892391 is an apocalyptic number.

225892391 is a deficient number, since it is larger than the sum of its proper divisors (1).

225892391 is an equidigital number, since it uses as much as digits as its factorization.

225892391 is an evil number, because the sum of its binary digits is even.

The product of its digits is 77760, while the sum is 41.

The square root of 225892391 is about 15029.7169301354. The cubic root of 225892391 is about 609.0232428667.

It can be divided in two parts, 2258 and 92391, that added together give a palindrome (94649).

The spelling of 225892391 in words is "two hundred twenty-five million, eight hundred ninety-two thousand, three hundred ninety-one".