231355427 has 2 divisors, whose sum is σ = 231355428. Its totient is φ = 231355426.

The previous prime is 231355403. The next prime is 231355447. The reversal of 231355427 is 724553132.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 231355427 - 2⁸ = 231355171 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 231355393 and 231355402.

It is not a weakly prime, because it can be changed into another prime (231355447) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 115677713 + 115677714.

It is an arithmetic number, because the mean of its divisors is an integer number (115677714).

Almost surely, 2^231355427 is an apocalyptic number.

231355427 is a deficient number, since it is larger than the sum of its proper divisors (1).

231355427 is an equidigital number, since it uses as much as digits as its factorization.

231355427 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 25200, while the sum is 32.

The square root of 231355427 is about 15210.3723491570. The cubic root of 231355427 is about 613.8937762532.

The spelling of 231355427 in words is "two hundred thirty-one million, three hundred fifty-five thousand, four hundred twenty-seven".