2192081 has 8 divisors (see below), whose sum is σ = 2284200. Its totient is φ = 2101120.

The previous prime is 2192077. The next prime is 2192089. The reversal of 2192081 is 1802912.

It can be written as a sum of positive squares in 4 ways, for example, as 115600 + 2076481 = 340^2 + 1441^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2192081 - 2² = 2192077 is a prime.

It is a super-2 number, since 2×2192081² = 9610438221122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2192089) 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, 7661 + ... + 7941.

It is an arithmetic number, because the mean of its divisors is an integer number (285525).

2^2192081 is an apocalyptic number.

It is an amenable number.

2192081 is a deficient number, since it is larger than the sum of its proper divisors (92119).

2192081 is a wasteful number, since it uses less digits than its factorization.

2192081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579.

The product of its (nonzero) digits is 288, while the sum is 23.

The square root of 2192081 is about 1480.5677964889. The cubic root of 2192081 is about 129.9029058042.

Adding to 2192081 its reverse (1802912), we get a palindrome (3994993).

The spelling of 2192081 in words is "two million, one hundred ninety-two thousand, eighty-one".