2191372 has 12 divisors (see below), whose sum is σ = 3859576. Its totient is φ = 1088640.

The previous prime is 2191363. The next prime is 2191373. The reversal of 2191372 is 2731912.

It is a super-2 number, since 2×2191372² = 9604222484768, which contains 22 as substring.

It is a hoax number, since the sum of its digits (25) coincides with the sum of the digits of its distinct prime factors.

It is a pancake number, because a pancake can be divided into 2191372 parts by 2093 straight cuts.

It is not an unprimeable number, because it can be changed into a prime (2191373) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1029 + ... + 2332.

2^2191372 is an apocalyptic number.

It is an amenable number.

2191372 is a deficient number, since it is larger than the sum of its proper divisors (1668204).

2191372 is a wasteful number, since it uses less digits than its factorization.

2191372 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3528 (or 3526 counting only the distinct ones).

The product of its digits is 756, while the sum is 25.

The square root of 2191372 is about 1480.3283419566. The cubic root of 2191372 is about 129.8888991607. Note that the first 4 decimals are identical.

The spelling of 2191372 in words is "two million, one hundred ninety-one thousand, three hundred seventy-two".