491824271 has 2 divisors, whose sum is σ = 491824272. Its totient is φ = 491824270.

The previous prime is 491824261. The next prime is 491824283. The reversal of 491824271 is 172428194.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 491824271 - 2¹⁰ = 491823247 is a prime.

It is a super-2 number, since 2×491824271² = 483782227089362882, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (491824211) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 245912135 + 245912136.

It is an arithmetic number, because the mean of its divisors is an integer number (245912136).

Almost surely, 2^491824271 is an apocalyptic number.

491824271 is a deficient number, since it is larger than the sum of its proper divisors (1).

491824271 is an equidigital number, since it uses as much as digits as its factorization.

491824271 is an evil number, because the sum of its binary digits is even.

The product of its digits is 32256, while the sum is 38.

The square root of 491824271 is about 22177.1114214633. Note that the first 3 decimals coincide. The cubic root of 491824271 is about 789.3506767252.

The spelling of 491824271 in words is "four hundred ninety-one million, eight hundred twenty-four thousand, two hundred seventy-one".