255430031 has 2 divisors, whose sum is σ = 255430032. Its totient is φ = 255430030.

The previous prime is 255430013. The next prime is 255430037. The reversal of 255430031 is 130034552.

Together with previous prime (255430013) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-255430031 is a prime.

It is a super-2 number, since 2×255430031² = 130489001473321922, which contains 22 as substring.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 255429979 and 255430006.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255430037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127715015 + 127715016.

It is an arithmetic number, because the mean of its divisors is an integer number (127715016).

Almost surely, 2^255430031 is an apocalyptic number.

255430031 is a deficient number, since it is larger than the sum of its proper divisors (1).

255430031 is an equidigital number, since it uses as much as digits as its factorization.

255430031 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1800, while the sum is 23.

The square root of 255430031 is about 15982.1785436154. The cubic root of 255430031 is about 634.4888365717.

Adding to 255430031 its reverse (130034552), we get a palindrome (385464583).

The spelling of 255430031 in words is "two hundred fifty-five million, four hundred thirty thousand, thirty-one".