225839381 has 2 divisors, whose sum is σ = 225839382. Its totient is φ = 225839380.

The previous prime is 225839351. The next prime is 225839387. The reversal of 225839381 is 183938522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 125238481 + 100600900 = 11191^2 + 10030^2 .

It is a cyclic number.

It is not a de Polignac number, because 225839381 - 2²² = 221645077 is a prime.

It is a super-2 number, since 2×225839381² = 102006852020926322, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225839387) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112919690 + 112919691.

It is an arithmetic number, because the mean of its divisors is an integer number (112919691).

Almost surely, 2^225839381 is an apocalyptic number.

It is an amenable number.

225839381 is a deficient number, since it is larger than the sum of its proper divisors (1).

225839381 is an equidigital number, since it uses as much as digits as its factorization.

225839381 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 103680, while the sum is 41.

The square root of 225839381 is about 15027.9533203960. The cubic root of 225839381 is about 608.9755994620.

The spelling of 225839381 in words is "two hundred twenty-five million, eight hundred thirty-nine thousand, three hundred eighty-one".