2191717441 has 8 divisors (see below), whose sum is σ = 2198296800. Its totient is φ = 2185149120.

The previous prime is 2191717433. The next prime is 2191717499. The reversal of 2191717441 is 1447171912.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2191717441 - 2³ = 2191717433 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2191717441.

It is not an unprimeable number, because it can be changed into a prime (2191717421) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 543330 + ... + 547348.

It is an arithmetic number, because the mean of its divisors is an integer number (274787100).

Almost surely, 2^2191717441 is an apocalyptic number.

It is an amenable number.

2191717441 is a deficient number, since it is larger than the sum of its proper divisors (6579359).

2191717441 is an equidigital number, since it uses as much as digits as its factorization.

2191717441 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5519.

The product of its digits is 14112, while the sum is 37.

The square root of 2191717441 is about 46815.7819650596. The cubic root of 2191717441 is about 1298.9572389480.

The spelling of 2191717441 in words is "two billion, one hundred ninety-one million, seven hundred seventeen thousand, four hundred forty-one".