2191463 has 8 divisors (see below), whose sum is σ = 2305536. Its totient is φ = 2079000.

The previous prime is 2191459. The next prime is 2191471. The reversal of 2191463 is 3641912.

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 2191463 - 2² = 2191459 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191433) 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, 3158 + ... + 3788.

It is an arithmetic number, because the mean of its divisors is an integer number (288192).

2^2191463 is an apocalyptic number.

2191463 is a gapful number since it is divisible by the number (23) formed by its first and last digit.

2191463 is a deficient number, since it is larger than the sum of its proper divisors (114073).

2191463 is a wasteful number, since it uses less digits than its factorization.

2191463 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 805.

The product of its digits is 1296, while the sum is 26.

The square root of 2191463 is about 1480.3590780618. The cubic root of 2191463 is about 129.8906970794.

The spelling of 2191463 in words is "two million, one hundred ninety-one thousand, four hundred sixty-three".