191051005 has 16 divisors (see below), whose sum is σ = 235309824. Its totient is φ = 148841280.

The previous prime is 191050999. The next prime is 191051009. The reversal of 191051005 is 500150191.

It is not a de Polignac number, because 191051005 - 2⁷ = 191050877 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191051009) 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 15 ways as a sum of consecutive naturals, for example, 47659 + ... + 51511.

It is an arithmetic number, because the mean of its divisors is an integer number (14706864).

Almost surely, 2^191051005 is an apocalyptic number.

It is an amenable number.

191051005 is a deficient number, since it is larger than the sum of its proper divisors (44258819).

191051005 is a wasteful number, since it uses less digits than its factorization.

191051005 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4116.

The product of its (nonzero) digits is 225, while the sum is 22.

The square root of 191051005 is about 13822.1201340460. The cubic root of 191051005 is about 575.9477803177.

The spelling of 191051005 in words is "one hundred ninety-one million, fifty-one thousand, five".