2156833 has 6 divisors (see below), whose sum is σ = 2509026. Its totient is φ = 1848672.

The previous prime is 2156813. The next prime is 2156839. The reversal of 2156833 is 3386512.

It can be written as a sum of positive squares in only one way, i.e., 2039184 + 117649 = 1428^2 + 343^2 .

It is not a de Polignac number, because 2156833 - 2⁵ = 2156801 is a prime.

It is an Ulam number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2156839) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 21960 + ... + 22057.

It is an arithmetic number, because the mean of its divisors is an integer number (418171).

2^2156833 is an apocalyptic number.

It is an amenable number.

2156833 is a deficient number, since it is larger than the sum of its proper divisors (352193).

2156833 is an equidigital number, since it uses as much as digits as its factorization.

2156833 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44031 (or 44024 counting only the distinct ones).

The product of its digits is 4320, while the sum is 28.

The square root of 2156833 is about 1468.6160151653. The cubic root of 2156833 is about 129.2028736976.

The spelling of 2156833 in words is "two million, one hundred fifty-six thousand, eight hundred thirty-three".