2081750681 has 4 divisors (see below), whose sum is σ = 2083595700. Its totient is φ = 2079905664.

The previous prime is 2081750663. The next prime is 2081750717. The reversal of 2081750681 is 1860571802.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 1860571802 = 2 ⋅930285901.

It can be written as a sum of positive squares in 2 ways, for example, as 202094656 + 1879656025 = 14216^2 + 43355^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2081750681 is a prime.

It is a super-2 number, since 2×2081750681² = 8667371795687927522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081750611) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 920816 + ... + 923073.

It is an arithmetic number, because the mean of its divisors is an integer number (520898925).

Almost surely, 2^2081750681 is an apocalyptic number.

It is an amenable number.

2081750681 is a deficient number, since it is larger than the sum of its proper divisors (1845019).

2081750681 is a wasteful number, since it uses less digits than its factorization.

2081750681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1845018.

The product of its (nonzero) digits is 26880, while the sum is 38.

The square root of 2081750681 is about 45626.2060772096. The cubic root of 2081750681 is about 1276.8588916821.

The spelling of 2081750681 in words is "two billion, eighty-one million, seven hundred fifty thousand, six hundred eighty-one".