491573115 has 72 divisors (see below), whose sum is σ = 947582064. Its totient is φ = 233788800.

The previous prime is 491573081. The next prime is 491573143. The reversal of 491573115 is 511375194.

It is a happy number.

491573115 is a `hidden beast` number, since 491 + 57 + 3 + 115 = 666.

It is not a de Polignac number, because 491573115 - 2⁶ = 491573051 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 491573115.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2495197 + ... + 2495393.

It is an arithmetic number, because the mean of its divisors is an integer number (13160862).

Almost surely, 2^491573115 is an apocalyptic number.

491573115 is a gapful number since it is divisible by the number (45) formed by its first and last digit.

491573115 is a deficient number, since it is larger than the sum of its proper divisors (456008949).

491573115 is a wasteful number, since it uses less digits than its factorization.

491573115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 361 (or 287 counting only the distinct ones).

The product of its digits is 18900, while the sum is 36.

The square root of 491573115 is about 22171.4481935664. The cubic root of 491573115 is about 789.2162900306.

The spelling of 491573115 in words is "four hundred ninety-one million, five hundred seventy-three thousand, one hundred fifteen".