2191122 has 24 divisors (see below), whose sum is σ = 4864860. Its totient is φ = 712320.

The previous prime is 2191121. The next prime is 2191127. The reversal of 2191122 is 2211912.

It can be written as a sum of positive squares in 2 ways, for example, as 1418481 + 772641 = 1191^2 + 879^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 2191095 and 2191104.

It is not an unprimeable number, because it can be changed into a prime (2191121) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 747 + ... + 2222.

2^2191122 is an apocalyptic number.

2191122 is an abundant number, since it is smaller than the sum of its proper divisors (2673738).

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

2191122 is a wasteful number, since it uses less digits than its factorization.

2191122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3018 (or 3015 counting only the distinct ones).

The product of its digits is 72, while the sum is 18.

The square root of 2191122 is about 1480.2438988221. The cubic root of 2191122 is about 129.8839595673.

The spelling of 2191122 in words is "two million, one hundred ninety-one thousand, one hundred twenty-two".