2000215681 has 4 divisors (see below), whose sum is σ = 2033006164. Its totient is φ = 1967425200.

The previous prime is 2000215667. The next prime is 2000215687. The reversal of 2000215681 is 1865120002.

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 1050343281 + 949872400 = 32409^2 + 30820^2 .

It is a cyclic number.

It is not a de Polignac number, because 2000215681 - 2²³ = 1991827073 is a prime.

It is a super-2 number, since 2×2000215681² = 8001725541036587522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2000215687) 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, 16395150 + ... + 16395271.

It is an arithmetic number, because the mean of its divisors is an integer number (508251541).

Almost surely, 2^2000215681 is an apocalyptic number.

It is an amenable number.

2000215681 is a deficient number, since it is larger than the sum of its proper divisors (32790483).

2000215681 is an equidigital number, since it uses as much as digits as its factorization.

2000215681 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 32790482.

The product of its (nonzero) digits is 960, while the sum is 25.

The square root of 2000215681 is about 44723.7708718753. The cubic root of 2000215681 is about 1259.9663384389.

Adding to 2000215681 its reverse (1865120002), we get a palindrome (3865335683).

The spelling of 2000215681 in words is "two billion, two hundred fifteen thousand, six hundred eighty-one".