2106206731 has 8 divisors (see below), whose sum is σ = 2139911280. Its totient is φ = 2072633472.

The previous prime is 2106206717. The next prime is 2106206741. The reversal of 2106206731 is 1376026012.

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 2106206731 - 2⁵ = 2106206699 is a prime.

It is a super-2 number, since 2×2106206731² = 8872213587419412722, which contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 2106206731.

It is not an unprimeable number, because it can be changed into a prime (2106206701) 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, 226 + ... + 64903.

It is an arithmetic number, because the mean of its divisors is an integer number (267488910).

Almost surely, 2^2106206731 is an apocalyptic number.

2106206731 is a deficient number, since it is larger than the sum of its proper divisors (33704549).

2106206731 is an equidigital number, since it uses as much as digits as its factorization.

2106206731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65645.

The product of its (nonzero) digits is 3024, while the sum is 28.

The square root of 2106206731 is about 45893.4279717696. The cubic root of 2106206731 is about 1281.8395447801.

The spelling of 2106206731 in words is "two billion, one hundred six million, two hundred six thousand, seven hundred thirty-one".