2156304233 has 4 divisors (see below), whose sum is σ = 2157209220. Its totient is φ = 2155399248.

The previous prime is 2156304209. The next prime is 2156304287. The reversal of 2156304233 is 3324036512.

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 428821264 + 1727482969 = 20708^2 + 41563^2 .

It is a cyclic number.

It is not a de Polignac number, because 2156304233 - 2¹⁸ = 2156042089 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2156304196 and 2156304205.

It is not an unprimeable number, because it can be changed into a prime (2156304133) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 448910 + ... + 453687.

It is an arithmetic number, because the mean of its divisors is an integer number (539302305).

Almost surely, 2^2156304233 is an apocalyptic number.

It is an amenable number.

2156304233 is a deficient number, since it is larger than the sum of its proper divisors (904987).

2156304233 is an equidigital number, since it uses as much as digits as its factorization.

2156304233 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 904986.

The product of its (nonzero) digits is 12960, while the sum is 29.

The square root of 2156304233 is about 46436.0230101588. The cubic root of 2156304233 is about 1291.9231441932.

The spelling of 2156304233 in words is "two billion, one hundred fifty-six million, three hundred four thousand, two hundred thirty-three".