2200991 has 4 divisors (see below), whose sum is σ = 2370312. Its totient is φ = 2031672.

The previous prime is 2200987. The next prime is 2200993. The reversal of 2200991 is 1990022.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2200991 - 2² = 2200987 is a prime.

It is a super-2 number, since 2×2200991² = 9688722764162, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2200993) 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, 84641 + ... + 84666.

It is an arithmetic number, because the mean of its divisors is an integer number (592578).

2^2200991 is an apocalyptic number.

2200991 is a deficient number, since it is larger than the sum of its proper divisors (169321).

2200991 is a wasteful number, since it uses less digits than its factorization.

2200991 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 169320.

The product of its (nonzero) digits is 324, while the sum is 23.

The square root of 2200991 is about 1483.5737258391. The cubic root of 2200991 is about 130.0786703313.

The spelling of 2200991 in words is "two million, two hundred thousand, nine hundred ninety-one".