2206731 has 8 divisors (see below), whose sum is σ = 2949184. Its totient is φ = 1467720.

The previous prime is 2206723. The next prime is 2206733. The reversal of 2206731 is 1376022.

It is a happy number.

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

It is not a de Polignac number, because 2206731 - 2³ = 2206723 is a prime.

It is a super-2 number, since 2×2206731² = 9739323412722, which contains 22 as substring.

It is a d-powerful number, because it can be written as 2¹¹ + 2¹⁹ + 0 + 6⁸ + 7² + 3⁶ + 1 .

It is a Duffinian number.

2206731 is a lucky number.

It is a junction number, because it is equal to n+sod(n) for n = 2206698 and 2206707.

It is not an unprimeable number, because it can be changed into a prime (2206733) 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, 1980 + ... + 2886.

It is an arithmetic number, because the mean of its divisors is an integer number (368648).

2^2206731 is an apocalyptic number.

2206731 is a deficient number, since it is larger than the sum of its proper divisors (742453).

2206731 is an equidigital number, since it uses as much as digits as its factorization.

2206731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1721.

The product of its (nonzero) digits is 504, while the sum is 21.

The square root of 2206731 is about 1485.5069841640. The cubic root of 2206731 is about 130.1916502629.

The spelling of 2206731 in words is "two million, two hundred six thousand, seven hundred thirty-one".