2113255578 has 64 divisors (see below), whose sum is σ = 5006396160. Its totient is φ = 581855232.

The previous prime is 2113255577. The next prime is 2113255589. The reversal of 2113255578 is 8755523112.

It is a super-2 number, since 2×2113255578² = 8931698275896228168, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (2113255577) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 794026 + ... + 796682.

It is an arithmetic number, because the mean of its divisors is an integer number (78224940).

Almost surely, 2^2113255578 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2113255578, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2503198080).

2113255578 is an abundant number, since it is smaller than the sum of its proper divisors (2893140582).

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

2113255578 is a wasteful number, since it uses less digits than its factorization.

2113255578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3351.

The product of its digits is 84000, while the sum is 39.

The square root of 2113255578 is about 45970.1596473190. The cubic root of 2113255578 is about 1283.2679309710.

The spelling of 2113255578 in words is "two billion, one hundred thirteen million, two hundred fifty-five thousand, five hundred seventy-eight".