855622871 has 2 divisors, whose sum is σ = 855622872. Its totient is φ = 855622870.

The previous prime is 855622861. The next prime is 855622879. The reversal of 855622871 is 178226558.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 855622871 - 2¹⁴ = 855606487 is a prime.

It is a Sophie Germain prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (855622879) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 427811435 + 427811436.

It is an arithmetic number, because the mean of its divisors is an integer number (427811436).

Almost surely, 2^855622871 is an apocalyptic number.

855622871 is a deficient number, since it is larger than the sum of its proper divisors (1).

855622871 is an equidigital number, since it uses as much as digits as its factorization.

855622871 is an evil number, because the sum of its binary digits is even.

The product of its digits is 268800, while the sum is 44.

The square root of 855622871 is about 29251.0319647017. The cubic root of 855622871 is about 949.3524196102.

The spelling of 855622871 in words is "eight hundred fifty-five million, six hundred twenty-two thousand, eight hundred seventy-one".