2255855639 has 2 divisors, whose sum is σ = 2255855640. Its totient is φ = 2255855638.

The previous prime is 2255855587. The next prime is 2255855687. The reversal of 2255855639 is 9365585522.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2255855639 - 2²⁰ = 2254807063 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2255855699) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1127927819 + 1127927820.

It is an arithmetic number, because the mean of its divisors is an integer number (1127927820).

Almost surely, 2^2255855639 is an apocalyptic number.

2255855639 is a deficient number, since it is larger than the sum of its proper divisors (1).

2255855639 is an equidigital number, since it uses as much as digits as its factorization.

2255855639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240000, while the sum is 50.

The square root of 2255855639 is about 47495.8486501715. The cubic root of 2255855639 is about 1311.5064616929.

The spelling of 2255855639 in words is "two billion, two hundred fifty-five million, eight hundred fifty-five thousand, six hundred thirty-nine".