491481515 has 48 divisors (see below), whose sum is σ = 706982400. Its totient is φ = 326918592.

The previous prime is 491481511. The next prime is 491481527. The reversal of 491481515 is 515184194.

It is a happy number.

491481515 is digitally balanced in base 6, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 491481515 - 2² = 491481511 is a prime.

It is not an unprimeable number, because it can be changed into a prime (491481511) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1296596 + ... + 1296974.

It is an arithmetic number, because the mean of its divisors is an integer number (14728800).

Almost surely, 2^491481515 is an apocalyptic number.

491481515 is a deficient number, since it is larger than the sum of its proper divisors (215500885).

491481515 is a wasteful number, since it uses less digits than its factorization.

491481515 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 544 (or 537 counting only the distinct ones).

The product of its digits is 28800, while the sum is 38.

The square root of 491481515 is about 22169.3823775043. The cubic root of 491481515 is about 789.1672659887.

The spelling of 491481515 in words is "four hundred ninety-one million, four hundred eighty-one thousand, five hundred fifteen".