191082715 has 12 divisors (see below), whose sum is σ = 242005104. Its totient is φ = 144819216.

The previous prime is 191082713. The next prime is 191082721. The reversal of 191082715 is 517280191.

It is a happy number.

It is not a de Polignac number, because 191082715 - 2¹ = 191082713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (191082713) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 51127 + ... + 54736.

It is an arithmetic number, because the mean of its divisors is an integer number (20167092).

Almost surely, 2^191082715 is an apocalyptic number.

191082715 is a deficient number, since it is larger than the sum of its proper divisors (50922389).

191082715 is a wasteful number, since it uses less digits than its factorization.

191082715 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 105906 (or 105887 counting only the distinct ones).

The product of its (nonzero) digits is 5040, while the sum is 34.

The square root of 191082715 is about 13823.2671608415. The cubic root of 191082715 is about 575.9796431768.

The spelling of 191082715 in words is "one hundred ninety-one million, eighty-two thousand, seven hundred fifteen".