491133312 has 48 divisors (see below), whose sum is σ = 1413290580. Its totient is φ = 163710720.

The previous prime is 491133277. The next prime is 491133319. The reversal of 491133312 is 213331194.

It is a tau number, because it is divible by the number of its divisors (48).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491133319) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 212014 + ... + 214317.

Almost surely, 2^491133312 is an apocalyptic number.

It is an amenable number.

491133312 is an abundant number, since it is smaller than the sum of its proper divisors (922157268).

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

491133312 is a wasteful number, since it uses less digits than its factorization.

491133312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 426351 (or 426336 counting only the distinct ones).

The product of its digits is 1944, while the sum is 27.

The square root of 491133312 is about 22161.5277451714. The cubic root of 491133312 is about 788.9808531933.

It can be divided in two parts, 49113 and 3312, that added together give a palindrome (52425).

The spelling of 491133312 in words is "four hundred ninety-one million, one hundred thirty-three thousand, three hundred twelve".