2159365081 has 16 divisors (see below), whose sum is σ = 2252275200. Its totient is φ = 2068704000.

The previous prime is 2159365069. The next prime is 2159365123. The reversal of 2159365081 is 1805639512.

It is a cyclic number.

It is not a de Polignac number, because 2159365081 - 2¹⁷ = 2159234009 is a prime.

It is a super-3 number, since 3×2159365081³ (a number of 29 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2159365001) 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, 549040 + ... + 552958.

It is an arithmetic number, because the mean of its divisors is an integer number (140767200).

Almost surely, 2^2159365081 is an apocalyptic number.

It is an amenable number.

2159365081 is a deficient number, since it is larger than the sum of its proper divisors (92910119).

2159365081 is a wasteful number, since it uses less digits than its factorization.

2159365081 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4200.

The product of its (nonzero) digits is 64800, while the sum is 40.

The square root of 2159365081 is about 46468.9690115888. The cubic root of 2159365081 is about 1292.5341449850.

The spelling of 2159365081 in words is "two billion, one hundred fifty-nine million, three hundred sixty-five thousand, eighty-one".