2168259481 has 4 divisors (see below), whose sum is σ = 2187447732. Its totient is φ = 2149071232.

The previous prime is 2168259463. The next prime is 2168259487. The reversal of 2168259481 is 1849528612.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1040643081 + 1127616400 = 32259^2 + 33580^2 .

It is a cyclic number.

It is not a de Polignac number, because 2168259481 - 2¹¹ = 2168257433 is a prime.

It is a super-2 number, since 2×2168259481² = 9402698353892778722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168259487) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 9593956 + ... + 9594181.

It is an arithmetic number, because the mean of its divisors is an integer number (546861933).

Almost surely, 2^2168259481 is an apocalyptic number.

It is an amenable number.

2168259481 is a deficient number, since it is larger than the sum of its proper divisors (19188251).

2168259481 is a wasteful number, since it uses less digits than its factorization.

2168259481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19188250.

The product of its digits is 276480, while the sum is 46.

The square root of 2168259481 is about 46564.5732397496. The cubic root of 2168259481 is about 1294.3063584045.

The spelling of 2168259481 in words is "two billion, one hundred sixty-eight million, two hundred fifty-nine thousand, four hundred eighty-one".