2112173491 has 2 divisors, whose sum is σ = 2112173492. Its totient is φ = 2112173490.

The previous prime is 2112173461. The next prime is 2112173519. The reversal of 2112173491 is 1943712112.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2112173491 - 2⁷ = 2112173363 is a prime.

It is a super-2 number, since 2×2112173491² = 8922553712166254162, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2112173461) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1056086745 + 1056086746.

It is an arithmetic number, because the mean of its divisors is an integer number (1056086746).

Almost surely, 2^2112173491 is an apocalyptic number.

2112173491 is a deficient number, since it is larger than the sum of its proper divisors (1).

2112173491 is an equidigital number, since it uses as much as digits as its factorization.

2112173491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 31.

The square root of 2112173491 is about 45958.3886902054. The cubic root of 2112173491 is about 1283.0488622447.

The spelling of 2112173491 in words is "two billion, one hundred twelve million, one hundred seventy-three thousand, four hundred ninety-one".