2131109993 has 4 divisors (see below), whose sum is σ = 2144684100. Its totient is φ = 2117535888.

The previous prime is 2131109983. The next prime is 2131110001. The reversal of 2131109993 is 3999011312.

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 1352253529 + 778856464 = 36773^2 + 27908^2 .

It is a cyclic number.

It is not a de Polignac number, because 2131109993 - 2⁸ = 2131109737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2131109963) 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, 6786818 + ... + 6787131.

It is an arithmetic number, because the mean of its divisors is an integer number (536171025).

Almost surely, 2^2131109993 is an apocalyptic number.

It is an amenable number.

2131109993 is a deficient number, since it is larger than the sum of its proper divisors (13574107).

2131109993 is a wasteful number, since it uses less digits than its factorization.

2131109993 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13574106.

The product of its (nonzero) digits is 13122, while the sum is 38.

The square root of 2131109993 is about 46163.9468958190. The cubic root of 2131109993 is about 1286.8718132974.

The spelling of 2131109993 in words is "two billion, one hundred thirty-one million, one hundred nine thousand, nine hundred ninety-three".