2256129355 has 4 divisors (see below), whose sum is σ = 2707355232. Its totient is φ = 1804903480.

The previous prime is 2256129319. The next prime is 2256129361. The reversal of 2256129355 is 5539216522.

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

It is not a de Polignac number, because 2256129355 - 2¹³ = 2256121163 is a prime.

It is a Smith number, since the sum of its digits (40) 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 an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 225612931 + ... + 225612940.

It is an arithmetic number, because the mean of its divisors is an integer number (676838808).

Almost surely, 2^2256129355 is an apocalyptic number.

2256129355 is a deficient number, since it is larger than the sum of its proper divisors (451225877).

2256129355 is an equidigital number, since it uses as much as digits as its factorization.

2256129355 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 451225876.

The product of its digits is 162000, while the sum is 40.

The square root of 2256129355 is about 47498.7300356546. The cubic root of 2256129355 is about 1311.5595037668.

The spelling of 2256129355 in words is "two billion, two hundred fifty-six million, one hundred twenty-nine thousand, three hundred fifty-five".