2256170309 has 2 divisors, whose sum is σ = 2256170310. Its totient is φ = 2256170308.

The previous prime is 2256170233. The next prime is 2256170321. The reversal of 2256170309 is 9030716522.

2256170309 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1927473409 + 328696900 = 43903^2 + 18130^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-2256170309 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (2256170209) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1128085154 + 1128085155.

It is an arithmetic number, because the mean of its divisors is an integer number (1128085155).

Almost surely, 2^2256170309 is an apocalyptic number.

It is an amenable number.

2256170309 is a deficient number, since it is larger than the sum of its proper divisors (1).

2256170309 is an equidigital number, since it uses as much as digits as its factorization.

2256170309 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 22680, while the sum is 35.

The square root of 2256170309 is about 47499.1611399612. The cubic root of 2256170309 is about 1311.5674396716.

The spelling of 2256170309 in words is "two billion, two hundred fifty-six million, one hundred seventy thousand, three hundred nine".