2109813001 has 4 divisors (see below), whose sum is σ = 2166835012. Its totient is φ = 2052790992.

The previous prime is 2109812993. The next prime is 2109813007. The reversal of 2109813001 is 1003189012.

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 890127225 + 1219685776 = 29835^2 + 34924^2 .

It is a cyclic number.

It is not a de Polignac number, because 2109813001 - 2³ = 2109812993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2109813007) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 28510950 + ... + 28511023.

It is an arithmetic number, because the mean of its divisors is an integer number (541708753).

Almost surely, 2^2109813001 is an apocalyptic number.

It is an amenable number.

2109813001 is a deficient number, since it is larger than the sum of its proper divisors (57022011).

2109813001 is an equidigital number, since it uses as much as digits as its factorization.

2109813001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57022010.

The product of its (nonzero) digits is 432, while the sum is 25.

The square root of 2109813001 is about 45932.7007805986. The cubic root of 2109813001 is about 1282.5707208183.

The spelling of 2109813001 in words is "two billion, one hundred nine million, eight hundred thirteen thousand, one".