2168415481 has 4 divisors (see below), whose sum is σ = 2218843792. Its totient is φ = 2117987172.

The previous prime is 2168415479. The next prime is 2168415499. The reversal of 2168415481 is 1845148612.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 2168415481 - 2¹ = 2168415479 is a prime.

It is a super-2 number, since 2×2168415481² = 9404051396480922722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2168415401) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25214091 + ... + 25214176.

It is an arithmetic number, because the mean of its divisors is an integer number (554710948).

Almost surely, 2^2168415481 is an apocalyptic number.

It is an amenable number.

2168415481 is a deficient number, since it is larger than the sum of its proper divisors (50428311).

2168415481 is an equidigital number, since it uses as much as digits as its factorization.

2168415481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50428310.

The product of its digits is 61440, while the sum is 40.

The square root of 2168415481 is about 46566.2483028212. The cubic root of 2168415481 is about 1294.3373981934.

The spelling of 2168415481 in words is "two billion, one hundred sixty-eight million, four hundred fifteen thousand, four hundred eighty-one".