6221195887 has 2 divisors, whose sum is σ = 6221195888. Its totient is φ = 6221195886.

The previous prime is 6221195881. The next prime is 6221195927. The reversal of 6221195887 is 7885911226.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 6221195887 - 2⁷ = 6221195759 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 6221195887.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (6221195881) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3110597943 + 3110597944.

It is an arithmetic number, because the mean of its divisors is an integer number (3110597944).

Almost surely, 2^6221195887 is an apocalyptic number.

6221195887 is a deficient number, since it is larger than the sum of its proper divisors (1).

6221195887 is an equidigital number, since it uses as much as digits as its factorization.

6221195887 is an evil number, because the sum of its binary digits is even.

The product of its digits is 483840, while the sum is 49.

The square root of 6221195887 is about 78874.5579195218. The cubic root of 6221195887 is about 1839.1816507984.

The spelling of 6221195887 in words is "six billion, two hundred twenty-one million, one hundred ninety-five thousand, eight hundred eighty-seven".