2164331 has 4 divisors (see below), whose sum is σ = 2330832. Its totient is φ = 1997832.

The previous prime is 2164313. The next prime is 2164367. The reversal of 2164331 is 1334612.

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 2164331 - 2¹⁰ = 2163307 is a prime.

It is a super-2 number, since 2×2164331² = 9368657355122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2164031) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 83231 + ... + 83256.

It is an arithmetic number, because the mean of its divisors is an integer number (582708).

2^2164331 is an apocalyptic number.

2164331 is a deficient number, since it is larger than the sum of its proper divisors (166501).

2164331 is a wasteful number, since it uses less digits than its factorization.

2164331 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 166500.

The product of its digits is 432, while the sum is 20.

The square root of 2164331 is about 1471.1665439372. The cubic root of 2164331 is about 129.3524205424.

Adding to 2164331 its reverse (1334612), we get a palindrome (3498943).

The spelling of 2164331 in words is "two million, one hundred sixty-four thousand, three hundred thirty-one".