2106720755 has 8 divisors (see below), whose sum is σ = 2529647712. Its totient is φ = 1684321408.

The previous prime is 2106720751. The next prime is 2106720761. The reversal of 2106720755 is 5570276012.

It is a happy number.

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 2106720755 - 2² = 2106720751 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2106720751) 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, 123062 + ... + 139131.

It is an arithmetic number, because the mean of its divisors is an integer number (316205964).

Almost surely, 2^2106720755 is an apocalyptic number.

2106720755 is a deficient number, since it is larger than the sum of its proper divisors (422926957).

2106720755 is a wasteful number, since it uses less digits than its factorization.

2106720755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263805.

The product of its (nonzero) digits is 29400, while the sum is 35.

The square root of 2106720755 is about 45899.0278219485. The cubic root of 2106720755 is about 1281.9438148067.

Adding to 2106720755 its reverse (5570276012), we get a palindrome (7676996767).

The spelling of 2106720755 in words is "two billion, one hundred six million, seven hundred twenty thousand, seven hundred fifty-five".