2196881 has 2 divisors, whose sum is σ = 2196882. Its totient is φ = 2196880.

The previous prime is 2196871. The next prime is 2196889. The reversal of 2196881 is 1886912.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1985281 + 211600 = 1409^2 + 460^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2196881 is a prime.

It is a super-2 number, since 2×2196881² = 9652572256322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (2196889) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1098440 + 1098441.

It is an arithmetic number, because the mean of its divisors is an integer number (1098441).

2^2196881 is an apocalyptic number.

It is an amenable number.

2196881 is a deficient number, since it is larger than the sum of its proper divisors (1).

2196881 is an equidigital number, since it uses as much as digits as its factorization.

2196881 is an evil number, because the sum of its binary digits is even.

The product of its digits is 6912, while the sum is 35.

The square root of 2196881 is about 1482.1879098144. The cubic root of 2196881 is about 129.9976528176.

The spelling of 2196881 in words is "two million, one hundred ninety-six thousand, eight hundred eighty-one".