2191375047 has 32 divisors (see below), whose sum is σ = 3077803008. Its totient is φ = 1385561216.

The previous prime is 2191375037. The next prime is 2191375049. The reversal of 2191375047 is 7405731912.

It is a cyclic number.

It is not a de Polignac number, because 2191375047 - 2⁸ = 2191374791 is a prime.

It is a super-2 number, since 2×2191375047² = 9604249193228504418, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 2191374996 and 2191375014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2191375049) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 618493 + ... + 622025.

It is an arithmetic number, because the mean of its divisors is an integer number (96181344).

Almost surely, 2^2191375047 is an apocalyptic number.

2191375047 is a deficient number, since it is larger than the sum of its proper divisors (886427961).

2191375047 is a wasteful number, since it uses less digits than its factorization.

2191375047 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3719.

The product of its (nonzero) digits is 52920, while the sum is 39.

The square root of 2191375047 is about 46812.1249998331. The cubic root of 2191375047 is about 1298.8895936213.

The spelling of 2191375047 in words is "two billion, one hundred ninety-one million, three hundred seventy-five thousand, forty-seven".