255443431 has 2 divisors, whose sum is σ = 255443432. Its totient is φ = 255443430.

The previous prime is 255443423. The next prime is 255443437. The reversal of 255443431 is 134344552.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 255443431 - 2³ = 255443423 is a prime.

It is a super-2 number, since 2×255443431² = 130502692882103522, which contains 22 as substring.

It is a zygodrome in base 2.

It is a junction number, because it is equal to n+sod(n) for n = 255443393 and 255443402.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255443437) 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, 127721715 + 127721716.

It is an arithmetic number, because the mean of its divisors is an integer number (127721716).

Almost surely, 2^255443431 is an apocalyptic number.

255443431 is a deficient number, since it is larger than the sum of its proper divisors (1).

255443431 is an equidigital number, since it uses as much as digits as its factorization.

255443431 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 28800, while the sum is 31.

The square root of 255443431 is about 15982.5977550585. The cubic root of 255443431 is about 634.4999315888.

Adding to 255443431 its reverse (134344552), we get a palindrome (389787983).

The spelling of 255443431 in words is "two hundred fifty-five million, four hundred forty-three thousand, four hundred thirty-one".