491231204 has 12 divisors (see below), whose sum is σ = 861901824. Its totient is φ = 244973544.

The previous prime is 491231197. The next prime is 491231219. The reversal of 491231204 is 402132194.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 158792 + ... + 161855.

It is an arithmetic number, because the mean of its divisors is an integer number (71825152).

Almost surely, 2^491231204 is an apocalyptic number.

It is an amenable number.

491231204 is a deficient number, since it is larger than the sum of its proper divisors (370670620).

491231204 is a wasteful number, since it uses less digits than its factorization.

491231204 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321034 (or 321032 counting only the distinct ones).

The product of its (nonzero) digits is 1728, while the sum is 26.

The square root of 491231204 is about 22163.7362373766. The cubic root of 491231204 is about 789.0332692284.

Adding to 491231204 its reverse (402132194), we get a palindrome (893363398).

The spelling of 491231204 in words is "four hundred ninety-one million, two hundred thirty-one thousand, two hundred four".