191016 has 48 divisors (see below), whose sum is σ = 592800. Its totient is φ = 54432.

The previous prime is 190997. The next prime is 191021. The reversal of 191016 is 610191.

191016 = T₅₃ + T₅₄ + ... + T₁₀₈.

It is a super-2 number, since 2×191016² = 72974224512, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a self number, because there is not a number n which added to its sum of digits gives 191016.

It is a congruent number.

It is an unprimeable number.

191016 is an untouchable number, because it is not equal to the sum of proper divisors of any number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 315 + ... + 693.

It is an arithmetic number, because the mean of its divisors is an integer number (12350).

2¹⁹¹⁰¹⁶ is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191016, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (296400).

191016 is an abundant number, since it is smaller than the sum of its proper divisors (401784).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

191016 is a wasteful number, since it uses less digits than its factorization.

191016 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 398 (or 391 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 18.

The square root of 191016 is about 437.0537724354. The cubic root of 191016 is about 57.5912602480.

It can be divided in two parts, 19 and 1016, that added together give a triangular number (1035 = T₄₅).

The spelling of 191016 in words is "one hundred ninety-one thousand, sixteen".