2196081 has 6 divisors (see below), whose sum is σ = 3172130. Its totient is φ = 1464048.

The previous prime is 2196079. The next prime is 2196091. The reversal of 2196081 is 1806912.

It can be written as a sum of positive squares in only one way, i.e., 1245456 + 950625 = 1116^2 + 975^2 .

It is not a de Polignac number, because 2196081 - 2¹ = 2196079 is a prime.

It is a super-2 number, since 2×2196081² = 9645543517122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2196011) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 121996 + ... + 122013.

2^2196081 is an apocalyptic number.

It is an amenable number.

2196081 is a deficient number, since it is larger than the sum of its proper divisors (976049).

2196081 is a wasteful number, since it uses less digits than its factorization.

2196081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 244015 (or 244012 counting only the distinct ones).

The product of its (nonzero) digits is 864, while the sum is 27.

The square root of 2196081 is about 1481.9180139265. The cubic root of 2196081 is about 129.9818712393.

The spelling of 2196081 in words is "two million, one hundred ninety-six thousand, eighty-one".