2168481 has 16 divisors (see below), whose sum is σ = 3411968. Its totient is φ = 1198800.

The previous prime is 2168473. The next prime is 2168483. The reversal of 2168481 is 1848612.

It is not a de Polignac number, because 2168481 - 2³ = 2168473 is a prime.

It is a super-2 number, since 2×2168481² = 9404619694722, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (2168483) 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, 1015 + ... + 2316.

It is an arithmetic number, because the mean of its divisors is an integer number (213248).

2^2168481 is an apocalyptic number.

2168481 is a gapful number since it is divisible by the number (21) formed by its first and last digit.

It is an amenable number.

2168481 is a deficient number, since it is larger than the sum of its proper divisors (1243487).

2168481 is a wasteful number, since it uses less digits than its factorization.

2168481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3372.

The product of its digits is 3072, while the sum is 30.

The square root of 2168481 is about 1472.5763138120. The cubic root of 2168481 is about 129.4350434262.

The spelling of 2168481 in words is "two million, one hundred sixty-eight thousand, four hundred eighty-one".