191022 has 32 divisors (see below), whose sum is σ = 430080. Its totient is φ = 56160.

The previous prime is 191021. The next prime is 191027. The reversal of 191022 is 220191.

It is a happy number.

It is an Ulam number.

It is a junction number, because it is equal to n+sod(n) for n = 190992 and 191010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (191021) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2379 + ... + 2457.

It is an arithmetic number, because the mean of its divisors is an integer number (13440).

2¹⁹¹⁰²² is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 191022, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215040).

191022 is an abundant number, since it is smaller than the sum of its proper divisors (239058).

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

191022 is a wasteful number, since it uses less digits than its factorization.

191022 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128.

The product of its (nonzero) digits is 36, while the sum is 15.

The square root of 191022 is about 437.0606365254. The cubic root of 191022 is about 57.5918632411.

The spelling of 191022 in words is "one hundred ninety-one thousand, twenty-two".