2201378345 has 4 divisors (see below), whose sum is σ = 2641654020. Its totient is φ = 1761102672.

The previous prime is 2201378329. The next prime is 2201378353. The reversal of 2201378345 is 5438731022.

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 769285696 + 1432092649 = 27736^2 + 37843^2 .

It is a cyclic number.

It is not a de Polignac number, because 2201378345 - 2⁴ = 2201378329 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, 220137830 + ... + 220137839.

It is an arithmetic number, because the mean of its divisors is an integer number (660413505).

Almost surely, 2^2201378345 is an apocalyptic number.

It is an amenable number.

2201378345 is a deficient number, since it is larger than the sum of its proper divisors (440275675).

2201378345 is an equidigital number, since it uses as much as digits as its factorization.

2201378345 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 440275674.

The product of its (nonzero) digits is 40320, while the sum is 35.

The square root of 2201378345 is about 46918.8485046255. The cubic root of 2201378345 is about 1300.8630058617.

The spelling of 2201378345 in words is "two billion, two hundred one million, three hundred seventy-eight thousand, three hundred forty-five".