2106755513 has 4 divisors (see below), whose sum is σ = 2128474740. Its totient is φ = 2085036288.

The previous prime is 2106755509. The next prime is 2106755531. The reversal of 2106755513 is 3155576012.

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 572309929 + 1534445584 = 23923^2 + 39172^2 .

It is a cyclic number.

It is not a de Polignac number, because 2106755513 - 2² = 2106755509 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106755113) 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, 10859468 + ... + 10859661.

It is an arithmetic number, because the mean of its divisors is an integer number (532118685).

Almost surely, 2^2106755513 is an apocalyptic number.

It is an amenable number.

2106755513 is a deficient number, since it is larger than the sum of its proper divisors (21719227).

2106755513 is an equidigital number, since it uses as much as digits as its factorization.

2106755513 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21719226.

The product of its (nonzero) digits is 31500, while the sum is 35.

The square root of 2106755513 is about 45899.4064558574. The cubic root of 2106755513 is about 1281.9508648722.

The spelling of 2106755513 in words is "two billion, one hundred six million, seven hundred fifty-five thousand, five hundred thirteen".