2256170251 has 4 divisors (see below), whose sum is σ = 2256480504. Its totient is φ = 2255860000.

The previous prime is 2256170233. The next prime is 2256170309. The reversal of 2256170251 is 1520716522.

2256170251 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 2256170251 - 2¹⁵ = 2256137483 is a prime.

It is a Smith number, since the sum of its digits (31) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2256170051) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 143950 + ... + 158851.

It is an arithmetic number, because the mean of its divisors is an integer number (564120126).

Almost surely, 2^2256170251 is an apocalyptic number.

2256170251 is a deficient number, since it is larger than the sum of its proper divisors (310253).

2256170251 is an equidigital number, since it uses as much as digits as its factorization.

2256170251 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 310252.

The product of its (nonzero) digits is 8400, while the sum is 31.

The square root of 2256170251 is about 47499.1605294241. The cubic root of 2256170251 is about 1311.5674284326.

Adding to 2256170251 its reverse (1520716522), we get a palindrome (3776886773).

The spelling of 2256170251 in words is "two billion, two hundred fifty-six million, one hundred seventy thousand, two hundred fifty-one".