2191364 has 24 divisors (see below), whose sum is σ = 4458048. Its totient is φ = 923040.

The previous prime is 2191363. The next prime is 2191373. The reversal of 2191364 is 4631912.

It is not an unprimeable number, because it can be changed into a prime (2191363) 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, 1067 + ... + 2349.

It is an arithmetic number, because the mean of its divisors is an integer number (185752).

2^2191364 is an apocalyptic number.

It is an amenable number.

2191364 is an abundant number, since it is smaller than the sum of its proper divisors (2266684).

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

2191364 is a wasteful number, since it uses less digits than its factorization.

2191364 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1355 (or 1353 counting only the distinct ones).

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

The square root of 2191364 is about 1480.3256398509. The cubic root of 2191364 is about 129.8887410995. Note that the first 3 decimals are identical.

The spelling of 2191364 in words is "two million, one hundred ninety-one thousand, three hundred sixty-four".