2291821317 has 8 divisors (see below), whose sum is σ = 3395290880. Its totient is φ = 1527880860.

The previous prime is 2291821313. The next prime is 2291821331. The reversal of 2291821317 is 7131281922.

It is not a de Polignac number, because 2291821317 - 2² = 2291821313 is a prime.

It is a super-2 number, since 2×2291821317² = 10504889898111228978, 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 (2291821313) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42441109 + ... + 42441162.

It is an arithmetic number, because the mean of its divisors is an integer number (424411360).

Almost surely, 2^2291821317 is an apocalyptic number.

2291821317 is a gapful number since it is divisible by the number (27) formed by its first and last digit.

It is an amenable number.

2291821317 is a deficient number, since it is larger than the sum of its proper divisors (1103469563).

2291821317 is an equidigital number, since it uses as much as digits as its factorization.

2291821317 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 84882280 (or 84882274 counting only the distinct ones).

The product of its digits is 12096, while the sum is 36.

The square root of 2291821317 is about 47872.9706306179. The cubic root of 2291821317 is about 1318.4396386743.

The spelling of 2291821317 in words is "two billion, two hundred ninety-one million, eight hundred twenty-one thousand, three hundred seventeen".