2081917513 has 4 divisors (see below), whose sum is σ = 2242065028. Its totient is φ = 1921770000.

The previous prime is 2081917501. The next prime is 2081917531. The reversal of 2081917513 is 3157191802.

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 722373129 + 1359544384 = 26877^2 + 36872^2 .

It is a cyclic number.

It is not a de Polignac number, because 2081917513 - 2²⁵ = 2048363081 is a prime.

It is a super-2 number, since 2×2081917513² = 8668761061872210338, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2081917543) 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, 80073738 + ... + 80073763.

It is an arithmetic number, because the mean of its divisors is an integer number (560516257).

Almost surely, 2^2081917513 is an apocalyptic number.

It is an amenable number.

2081917513 is a deficient number, since it is larger than the sum of its proper divisors (160147515).

2081917513 is a wasteful number, since it uses less digits than its factorization.

2081917513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160147514.

The product of its (nonzero) digits is 15120, while the sum is 37.

The square root of 2081917513 is about 45628.0342881435. The cubic root of 2081917513 is about 1276.8930000305.

The spelling of 2081917513 in words is "two billion, eighty-one million, nine hundred seventeen thousand, five hundred thirteen".