2189111731 has 2 divisors, whose sum is σ = 2189111732. Its totient is φ = 2189111730.

The previous prime is 2189111711. The next prime is 2189111737. The reversal of 2189111731 is 1371119812.

2189111731 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 2189111731 - 2⁹ = 2189111219 is a prime.

It is a super-2 number, since 2×2189111731² = 9584420341603632722, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (2189111737) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 1094555865 + 1094555866.

It is an arithmetic number, because the mean of its divisors is an integer number (1094555866).

Almost surely, 2^2189111731 is an apocalyptic number.

2189111731 is a deficient number, since it is larger than the sum of its proper divisors (1).

2189111731 is an equidigital number, since it uses as much as digits as its factorization.

2189111731 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3024, while the sum is 34.

The square root of 2189111731 is about 46787.9442912381. The cubic root of 2189111731 is about 1298.4422625742.

The spelling of 2189111731 in words is "two billion, one hundred eighty-nine million, one hundred eleven thousand, seven hundred thirty-one".