2278255643 has 2 divisors, whose sum is σ = 2278255644. Its totient is φ = 2278255642.

The previous prime is 2278255619. The next prime is 2278255709. The reversal of 2278255643 is 3465528722.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2278255643 - 2²⁸ = 2009820187 is a prime.

It is a super-2 number, since 2×2278255643² = 10380897549722686898, which contains 22 as substring.

It is a Sophie Germain prime.

It is a junction number, because it is equal to n+sod(n) for n = 2278255594 and 2278255603.

It is not a weakly prime, because it can be changed into another prime (2278252643) 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, 1139127821 + 1139127822.

It is an arithmetic number, because the mean of its divisors is an integer number (1139127822).

Almost surely, 2^2278255643 is an apocalyptic number.

2278255643 is a deficient number, since it is larger than the sum of its proper divisors (1).

2278255643 is an equidigital number, since it uses as much as digits as its factorization.

2278255643 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 806400, while the sum is 44.

The square root of 2278255643 is about 47731.0762816009. The cubic root of 2278255643 is about 1315.8331341397.

The spelling of 2278255643 in words is "two billion, two hundred seventy-eight million, two hundred fifty-five thousand, six hundred forty-three".