2164981 has 16 divisors (see below), whose sum is σ = 2740864. Its totient is φ = 1664064.

The previous prime is 2164979. The next prime is 2164991. The reversal of 2164981 is 1894612.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 2164981 - 2¹ = 2164979 is a prime.

It is a super-2 number, since 2×2164981² = 9374285460722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2164901) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3046 + ... + 3688.

It is an arithmetic number, because the mean of its divisors is an integer number (171304).

2^2164981 is an apocalyptic number.

It is an amenable number.

2164981 is a deficient number, since it is larger than the sum of its proper divisors (575883).

2164981 is a wasteful number, since it uses less digits than its factorization.

2164981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 700.

The product of its digits is 3456, while the sum is 31.

The square root of 2164981 is about 1471.3874404792. The cubic root of 2164981 is about 129.3653684476.

The spelling of 2164981 in words is "two million, one hundred sixty-four thousand, nine hundred eighty-one".