231422647 has 2 divisors, whose sum is σ = 231422648. Its totient is φ = 231422646.

The previous prime is 231422627. The next prime is 231422651. The reversal of 231422647 is 746224132.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231422647 - 2¹¹ = 231420599 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (231422617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115711323 + 115711324.

It is an arithmetic number, because the mean of its divisors is an integer number (115711324).

Almost surely, 2^231422647 is an apocalyptic number.

231422647 is a deficient number, since it is larger than the sum of its proper divisors (1).

231422647 is an equidigital number, since it uses as much as digits as its factorization.

231422647 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16128, while the sum is 31.

The square root of 231422647 is about 15212.5818650221. The cubic root of 231422647 is about 613.9532258257.

Adding to 231422647 its reverse (746224132), we get a palindrome (977646779).

The spelling of 231422647 in words is "two hundred thirty-one million, four hundred twenty-two thousand, six hundred forty-seven".