2164281 has 12 divisors (see below), whose sum is σ = 3357072. Its totient is φ = 1236648.

The previous prime is 2164273. The next prime is 2164291. The reversal of 2164281 is 1824612.

It is not a de Polignac number, because 2164281 - 2³ = 2164273 is a prime.

It is a super-2 number, since 2×2164281² = 9368224493922, which contains 22 as substring.

2164281 is a lucky number.

It is not an unprimeable number, because it can be changed into a prime (2164291) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 7215 + ... + 7508.

It is an arithmetic number, because the mean of its divisors is an integer number (279756).

2^2164281 is an apocalyptic number.

2164281 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2164281 is a deficient number, since it is larger than the sum of its proper divisors (1192791).

2164281 is a wasteful number, since it uses less digits than its factorization.

2164281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14740 (or 14733 counting only the distinct ones).

The product of its digits is 768, while the sum is 24.

The square root of 2164281 is about 1471.1495505216. The cubic root of 2164281 is about 129.3514244423.

Adding to 2164281 its reverse (1824612), we get a palindrome (3988893).

The spelling of 2164281 in words is "two million, one hundred sixty-four thousand, two hundred eighty-one".