225431251 has 2 divisors, whose sum is σ = 225431252. Its totient is φ = 225431250.

The previous prime is 225431249. The next prime is 225431263. The reversal of 225431251 is 152134522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225431251 - 2¹ = 225431249 is a prime.

Together with 225431249, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (225431221) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112715625 + 112715626.

It is an arithmetic number, because the mean of its divisors is an integer number (112715626).

Almost surely, 2^225431251 is an apocalyptic number.

225431251 is a deficient number, since it is larger than the sum of its proper divisors (1).

225431251 is an equidigital number, since it uses as much as digits as its factorization.

225431251 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 2400, while the sum is 25.

The square root of 225431251 is about 15014.3681518737. The cubic root of 225431251 is about 608.6085375860.

Adding to 225431251 its reverse (152134522), we get a palindrome (377565773).

The spelling of 225431251 in words is "two hundred twenty-five million, four hundred thirty-one thousand, two hundred fifty-one".