2161850807 has 2 divisors, whose sum is σ = 2161850808. Its totient is φ = 2161850806.

The previous prime is 2161850771. The next prime is 2161850833. The reversal of 2161850807 is 7080581612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2161850807 - 2²² = 2157656503 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2161850897) 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, 1080925403 + 1080925404.

It is an arithmetic number, because the mean of its divisors is an integer number (1080925404).

Almost surely, 2^2161850807 is an apocalyptic number.

2161850807 is a deficient number, since it is larger than the sum of its proper divisors (1).

2161850807 is an equidigital number, since it uses as much as digits as its factorization.

2161850807 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 2161850807 is about 46495.7074040174. The cubic root of 2161850807 is about 1293.0299162840.

The spelling of 2161850807 in words is "two billion, one hundred sixty-one million, eight hundred fifty thousand, eight hundred seven".