2147814991 has 12 divisors (see below), whose sum is σ = 2502841728. Its totient is φ = 1837769472.

The previous prime is 2147814989. The next prime is 2147814997. The reversal of 2147814991 is 1994187412.

It is not a de Polignac number, because 2147814991 - 2¹ = 2147814989 is a prime.

It is a super-2 number, since 2×2147814991² = 9226218471128660162, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2147814997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 9711 + ... + 66256.

It is an arithmetic number, because the mean of its divisors is an integer number (208570144).

Almost surely, 2^2147814991 is an apocalyptic number.

2147814991 is a deficient number, since it is larger than the sum of its proper divisors (355026737).

2147814991 is an equidigital number, since it uses as much as digits as its factorization.

2147814991 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76558 (or 76551 counting only the distinct ones).

The product of its digits is 145152, while the sum is 46.

The square root of 2147814991 is about 46344.5249301360. The cubic root of 2147814991 is about 1290.2255061169.

The spelling of 2147814991 in words is "two billion, one hundred forty-seven million, eight hundred fourteen thousand, nine hundred ninety-one".