225400243781231 has 2 divisors, whose sum is σ = 225400243781232. Its totient is φ = 225400243781230.

The previous prime is 225400243781203. The next prime is 225400243781281. The reversal of 225400243781231 is 132187342004522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225400243781231 - 2³⁸ = 225125365874287 is a prime.

It is a super-2 number, since 2×225400243781231² (a number of 30 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (225400243781281) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112700121890615 + 112700121890616.

It is an arithmetic number, because the mean of its divisors is an integer number (112700121890616).

Almost surely, 2^{225400243781231} is an apocalyptic number.

225400243781231 is a deficient number, since it is larger than the sum of its proper divisors (1).

225400243781231 is an equidigital number, since it uses as much as digits as its factorization.

225400243781231 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 645120, while the sum is 44.

Adding to 225400243781231 its reverse (132187342004522), we get a palindrome (357587585785753).

The spelling of 225400243781231 in words is "two hundred twenty-five trillion, four hundred billion, two hundred forty-three million, seven hundred eighty-one thousand, two hundred thirty-one".