491931222 has 16 divisors (see below), whose sum is σ = 1026639360. Its totient is φ = 156847592.

The previous prime is 491931221. The next prime is 491931233. The reversal of 491931222 is 222139194.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491931221) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1782222 + ... + 1782497.

It is an arithmetic number, because the mean of its divisors is an integer number (64164960).

Almost surely, 2^491931222 is an apocalyptic number.

491931222 is an abundant number, since it is smaller than the sum of its proper divisors (534708138).

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

491931222 is a wasteful number, since it uses less digits than its factorization.

491931222 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3564747.

The product of its digits is 7776, while the sum is 33.

The square root of 491931222 is about 22179.5225827789. The cubic root of 491931222 is about 789.4078893860.

The spelling of 491931222 in words is "four hundred ninety-one million, nine hundred thirty-one thousand, two hundred twenty-two".