2191038039 has 16 divisors (see below), whose sum is σ = 3321472000. Its totient is φ = 1426721688.

The previous prime is 2191038023. The next prime is 2191038049. The reversal of 2191038039 is 9308301912.

It is not a de Polignac number, because 2191038039 - 2⁴ = 2191038023 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 2191037994 and 2191038012.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191038049) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 942439 + ... + 944760.

It is an arithmetic number, because the mean of its divisors is an integer number (207592000).

Almost surely, 2^2191038039 is an apocalyptic number.

2191038039 is a deficient number, since it is larger than the sum of its proper divisors (1130433961).

2191038039 is a wasteful number, since it uses less digits than its factorization.

2191038039 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1887251 (or 1887245 counting only the distinct ones).

The product of its (nonzero) digits is 11664, while the sum is 36.

The square root of 2191038039 is about 46808.5252811921. The cubic root of 2191038039 is about 1298.8230055025.

The spelling of 2191038039 in words is "two billion, one hundred ninety-one million, thirty-eight thousand, thirty-nine".