2256640122 has 32 divisors (see below), whose sum is σ = 4948599744. Its totient is φ = 680355200.

The previous prime is 2256640121. The next prime is 2256640153. The reversal of 2256640122 is 2210466522.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 2256640122.

It is not an unprimeable number, because it can be changed into a prime (2256640121) 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 15 ways as a sum of consecutive naturals, for example, 73779 + ... + 99782.

It is an arithmetic number, because the mean of its divisors is an integer number (154643742).

Almost surely, 2^2256640122 is an apocalyptic number.

2256640122 is a gapful number since it is divisible by the number (22) formed by its first and last digit.

2256640122 is an abundant number, since it is smaller than the sum of its proper divisors (2691959622).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

2256640122 is a wasteful number, since it uses less digits than its factorization.

2256640122 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173774.

The product of its (nonzero) digits is 11520, while the sum is 30.

The square root of 2256640122 is about 47504.1063698708. The cubic root of 2256640122 is about 1311.6584713142.

The spelling of 2256640122 in words is "two billion, two hundred fifty-six million, six hundred forty thousand, one hundred twenty-two".