191492216 has 16 divisors (see below), whose sum is σ = 380168640. Its totient is φ = 90113920.

The previous prime is 191492209. The next prime is 191492219. The reversal of 191492216 is 612294191.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191492219) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 703880 + ... + 704151.

It is an arithmetic number, because the mean of its divisors is an integer number (23760540).

Almost surely, 2^191492216 is an apocalyptic number.

It is an amenable number.

191492216 is a deficient number, since it is larger than the sum of its proper divisors (188676424).

191492216 is a wasteful number, since it uses less digits than its factorization.

191492216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1408054 (or 1408050 counting only the distinct ones).

The product of its digits is 7776, while the sum is 35.

The square root of 191492216 is about 13838.0712528878. The cubic root of 191492216 is about 576.3908018559.

The spelling of 191492216 in words is "one hundred ninety-one million, four hundred ninety-two thousand, two hundred sixteen".