255443023391 has 2 divisors, whose sum is σ = 255443023392. Its totient is φ = 255443023390.

The previous prime is 255443023387. The next prime is 255443023441. The reversal of 255443023391 is 193320344552.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 255443023391 - 2² = 255443023387 is a prime.

It is a super-2 number, since 2×255443023391² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255443023351) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127721511695 + 127721511696.

It is an arithmetic number, because the mean of its divisors is an integer number (127721511696).

Almost surely, 2^255443023391 is an apocalyptic number.

255443023391 is a deficient number, since it is larger than the sum of its proper divisors (1).

255443023391 is an equidigital number, since it uses as much as digits as its factorization.

255443023391 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 388800, while the sum is 41.

The spelling of 255443023391 in words is "two hundred fifty-five billion, four hundred forty-three million, twenty-three thousand, three hundred ninety-one".