491465215 has 16 divisors (see below), whose sum is σ = 594177120. Its totient is φ = 390238720.

The previous prime is 491465213. The next prime is 491465239. The reversal of 491465215 is 512564194.

It is not a de Polignac number, because 491465215 - 2¹ = 491465213 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491465213) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 645435 + ... + 646195.

It is an arithmetic number, because the mean of its divisors is an integer number (37136070).

Almost surely, 2^491465215 is an apocalyptic number.

491465215 is a deficient number, since it is larger than the sum of its proper divisors (102711905).

491465215 is a wasteful number, since it uses less digits than its factorization.

491465215 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1562.

The product of its digits is 43200, while the sum is 37.

The square root of 491465215 is about 22169.0147503221. The cubic root of 491465215 is about 789.1585416398.

The spelling of 491465215 in words is "four hundred ninety-one million, four hundred sixty-five thousand, two hundred fifteen".