491271850 has 24 divisors (see below), whose sum is σ = 918518220. Its totient is φ = 195486720.

The previous prime is 491271839. The next prime is 491271853. The reversal of 491271850 is 58172194.

It can be written as a sum of positive squares in 6 ways, for example, as 71554681 + 419717169 = 8459^2 + 20487^2 .

It is not an unprimeable number, because it can be changed into a prime (491271853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 15805 + ... + 35104.

Almost surely, 2^491271850 is an apocalyptic number.

491271850 is a deficient number, since it is larger than the sum of its proper divisors (427246370).

491271850 is a wasteful number, since it uses less digits than its factorization.

491271850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 51114 (or 51109 counting only the distinct ones).

The product of its (nonzero) digits is 20160, while the sum is 37.

The square root of 491271850 is about 22164.6531666976. The cubic root of 491271850 is about 789.0550309851.

The spelling of 491271850 in words is "four hundred ninety-one million, two hundred seventy-one thousand, eight hundred fifty".