491037201 has 16 divisors (see below), whose sum is σ = 737430720. Its totient is φ = 322872480.

The previous prime is 491037161. The next prime is 491037203. The reversal of 491037201 is 102730194.

It is not a de Polignac number, because 491037201 - 2⁶ = 491037137 is a prime.

It is a super-2 number, since 2×491037201² = 482235065531828802, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is not an unprimeable number, because it can be changed into a prime (491037203) 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 15 ways as a sum of consecutive naturals, for example, 122595 + ... + 126536.

It is an arithmetic number, because the mean of its divisors is an integer number (46089420).

Almost surely, 2^491037201 is an apocalyptic number.

It is an amenable number.

491037201 is a deficient number, since it is larger than the sum of its proper divisors (246393519).

491037201 is a wasteful number, since it uses less digits than its factorization.

491037201 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 249213 (or 249207 counting only the distinct ones).

The product of its (nonzero) digits is 1512, while the sum is 27.

The square root of 491037201 is about 22159.3592190749. The cubic root of 491037201 is about 788.9293840138.

Adding to 491037201 its reverse (102730194), we get a palindrome (593767395).

The spelling of 491037201 in words is "four hundred ninety-one million, thirty-seven thousand, two hundred one".