2191030 has 8 divisors (see below), whose sum is σ = 3943872. Its totient is φ = 876408.

The previous prime is 2191027. The next prime is 2191031. The reversal of 2191030 is 301912.

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

It is a super-2 number, since 2×2191030² = 9601224921800, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2190995 and 2191013.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 109542 + ... + 109561.

It is an arithmetic number, because the mean of its divisors is an integer number (492984).

2^2191030 is an apocalyptic number.

2191030 is a deficient number, since it is larger than the sum of its proper divisors (1752842).

2191030 is a wasteful number, since it uses less digits than its factorization.

2191030 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 219110.

The product of its (nonzero) digits is 54, while the sum is 16.

The square root of 2191030 is about 1480.2128225360. The cubic root of 2191030 is about 129.8821417024.

Adding to 2191030 its reverse (301912), we get a palindrome (2492942).

The spelling of 2191030 in words is "two million, one hundred ninety-one thousand, thirty".