225431249 has 2 divisors, whose sum is σ = 225431250. Its totient is φ = 225431248.

The previous prime is 225431233. The next prime is 225431251. The reversal of 225431249 is 942134522.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 154753600 + 70677649 = 12440^2 + 8407^2 .

It is a cyclic number.

It is not a de Polignac number, because 225431249 - 2⁴ = 225431233 is a prime.

Together with 225431251, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225431209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112715624 + 112715625.

It is an arithmetic number, because the mean of its divisors is an integer number (112715625).

Almost surely, 2^225431249 is an apocalyptic number.

It is an amenable number.

225431249 is a deficient number, since it is larger than the sum of its proper divisors (1).

225431249 is an equidigital number, since it uses as much as digits as its factorization.

225431249 is an evil number, because the sum of its binary digits is even.

The product of its digits is 17280, while the sum is 32.

The square root of 225431249 is about 15014.3680852709. The cubic root of 225431249 is about 608.6085357862.

The spelling of 225431249 in words is "two hundred twenty-five million, four hundred thirty-one thousand, two hundred forty-nine".