2164931 has 4 divisors (see below), whose sum is σ = 2185272. Its totient is φ = 2144592.

The previous prime is 2164927. The next prime is 2164963. The reversal of 2164931 is 1394612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2164931 - 2² = 2164927 is a prime.

It is a super-2 number, since 2×2164931² = 9373852469522, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2164931.

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

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10010 + ... + 10223.

It is an arithmetic number, because the mean of its divisors is an integer number (546318).

2^2164931 is an apocalyptic number.

2164931 is a deficient number, since it is larger than the sum of its proper divisors (20341).

2164931 is a wasteful number, since it uses less digits than its factorization.

2164931 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20340.

The product of its digits is 1296, while the sum is 26.

The square root of 2164931 is about 1471.3704496149. The cubic root of 2164931 is about 129.3643725469.

The spelling of 2164931 in words is "two million, one hundred sixty-four thousand, nine hundred thirty-one".