225431387 has 2 divisors, whose sum is σ = 225431388. Its totient is φ = 225431386.

The previous prime is 225431377. The next prime is 225431429. The reversal of 225431387 is 783134522.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 225431387 - 2¹⁰ = 225430363 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (225431377) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 112715693 + 112715694.

It is an arithmetic number, because the mean of its divisors is an integer number (112715694).

Almost surely, 2^225431387 is an apocalyptic number.

225431387 is a deficient number, since it is larger than the sum of its proper divisors (1).

225431387 is an equidigital number, since it uses as much as digits as its factorization.

225431387 is an evil number, because the sum of its binary digits is even.

The product of its digits is 40320, while the sum is 35.

The square root of 225431387 is about 15014.3726808682. The cubic root of 225431387 is about 608.6086599748.

The spelling of 225431387 in words is "two hundred twenty-five million, four hundred thirty-one thousand, three hundred eighty-seven".