2148568081 has 8 divisors (see below), whose sum is σ = 2363264928. Its totient is φ = 1953242500.

The previous prime is 2148568063. The next prime is 2148568087. The reversal of 2148568081 is 1808658412.

It is not a de Polignac number, because 2148568081 - 2⁵ = 2148568049 is a prime.

It is a super-2 number, since 2×2148568081² = 9232689597384045122, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2148568087) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 805795 + ... + 808456.

It is an arithmetic number, because the mean of its divisors is an integer number (295408116).

Almost surely, 2^2148568081 is an apocalyptic number.

It is an amenable number.

2148568081 is a deficient number, since it is larger than the sum of its proper divisors (214696847).

2148568081 is an equidigital number, since it uses as much as digits as its factorization.

2148568081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1614284 (or 1614262 counting only the distinct ones).

The product of its (nonzero) digits is 122880, while the sum is 43.

The square root of 2148568081 is about 46352.6491260208. The cubic root of 2148568081 is about 1290.3762860783.

The spelling of 2148568081 in words is "two billion, one hundred forty-eight million, five hundred sixty-eight thousand, eighty-one".