2113556345 has 4 divisors (see below), whose sum is σ = 2536267620. Its totient is φ = 1690845072.

The previous prime is 2113556327. The next prime is 2113556387. The reversal of 2113556345 is 5436553112.

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

It can be written as a sum of positive squares in 2 ways, for example, as 329676649 + 1783879696 = 18157^2 + 42236^2 .

It is a cyclic number.

It is not a de Polignac number, because 2113556345 - 2¹² = 2113552249 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 211355630 + ... + 211355639.

It is an arithmetic number, because the mean of its divisors is an integer number (634066905).

Almost surely, 2^2113556345 is an apocalyptic number.

It is an amenable number.

2113556345 is a deficient number, since it is larger than the sum of its proper divisors (422711275).

2113556345 is an equidigital number, since it uses as much as digits as its factorization.

2113556345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 422711274.

The product of its digits is 54000, while the sum is 35.

The square root of 2113556345 is about 45973.4308595737. The cubic root of 2113556345 is about 1283.3288080274.

The spelling of 2113556345 in words is "two billion, one hundred thirteen million, five hundred fifty-six thousand, three hundred forty-five".