2191236 has 12 divisors (see below), whose sum is σ = 5112912. Its totient is φ = 730408.

The previous prime is 2191229. The next prime is 2191243. The reversal of 2191236 is 6321912.

It is an interprime number because it is at equal distance from previous prime (2191229) and next prime (2191243).

It is a tau number, because it is divible by the number of its divisors (12).

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 91290 + ... + 91313.

It is an arithmetic number, because the mean of its divisors is an integer number (426076).

2^2191236 is an apocalyptic number.

It is an amenable number.

2191236 is an abundant number, since it is smaller than the sum of its proper divisors (2921676).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2191236 is a wasteful number, since it uses less digits than its factorization.

2191236 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 182610 (or 182608 counting only the distinct ones).

The product of its digits is 648, while the sum is 24.

The square root of 2191236 is about 1480.2824054889. The cubic root of 2191236 is about 129.8862120685.

The spelling of 2191236 in words is "two million, one hundred ninety-one thousand, two hundred thirty-six".