2201971931 has 2 divisors, whose sum is σ = 2201971932. Its totient is φ = 2201971930.

The previous prime is 2201971913. The next prime is 2201971963. The reversal of 2201971931 is 1391791022.

Together with previous prime (2201971913) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 2201971931 - 2²⁶ = 2134863067 is a prime.

It is a super-2 number, since 2×2201971931² = 9697360769823737522, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2201971891 and 2201971900.

It is not a weakly prime, because it can be changed into another prime (2201971991) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1100985965 + 1100985966.

It is an arithmetic number, because the mean of its divisors is an integer number (1100985966).

Almost surely, 2^2201971931 is an apocalyptic number.

2201971931 is a deficient number, since it is larger than the sum of its proper divisors (1).

2201971931 is an equidigital number, since it uses as much as digits as its factorization.

2201971931 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6804, while the sum is 35.

The square root of 2201971931 is about 46925.1737450167. The cubic root of 2201971931 is about 1300.9799181705.

The spelling of 2201971931 in words is "two billion, two hundred one million, nine hundred seventy-one thousand, nine hundred thirty-one".