2155817713 has 8 divisors (see below), whose sum is σ = 2465052480. Its totient is φ = 1846898160.

The previous prime is 2155817701. The next prime is 2155817723. The reversal of 2155817713 is 3177185512.

2155817713 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2155817713 - 2⁹ = 2155817201 is a prime.

It is a super-4 number, since 4×2155817713⁴ (a number of 38 digits) contains 4444 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2155817723) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63958 + ... + 91663.

It is an arithmetic number, because the mean of its divisors is an integer number (308131560).

Almost surely, 2^2155817713 is an apocalyptic number.

It is an amenable number.

2155817713 is a deficient number, since it is larger than the sum of its proper divisors (309234767).

2155817713 is a wasteful number, since it uses less digits than its factorization.

2155817713 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 157607.

The product of its digits is 58800, while the sum is 40.

The square root of 2155817713 is about 46430.7841092523. The cubic root of 2155817713 is about 1291.8259727278.

The spelling of 2155817713 in words is "two billion, one hundred fifty-five million, eight hundred seventeen thousand, seven hundred thirteen".