491504271 has 8 divisors (see below), whose sum is σ = 660342144. Its totient is φ = 325167960.

The previous prime is 491504219. The next prime is 491504281. The reversal of 491504271 is 172405194.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a de Polignac number, because none of the positive numbers 2^k-491504271 is a prime.

It is a super-2 number, since 2×491504271² = 483152896822482882, which contains 22 as substring.

It is a Smith number, since the sum of its digits (33) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491504281) 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, 624931 + ... + 625716.

It is an arithmetic number, because the mean of its divisors is an integer number (82542768).

Almost surely, 2^491504271 is an apocalyptic number.

491504271 is a deficient number, since it is larger than the sum of its proper divisors (168837873).

491504271 is a wasteful number, since it uses less digits than its factorization.

491504271 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1250781.

The product of its (nonzero) digits is 10080, while the sum is 33.

The square root of 491504271 is about 22169.8956019193. The cubic root of 491504271 is about 789.1794454994.

The spelling of 491504271 in words is "four hundred ninety-one million, five hundred four thousand, two hundred seventy-one".