491571325 has 48 divisors (see below), whose sum is σ = 738603520. Its totient is φ = 317027520.

The previous prime is 491571299. The next prime is 491571329. The reversal of 491571325 is 523175194.

It is not a de Polignac number, because 491571325 - 2⁵ = 491571293 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (491571329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 541522 + ... + 542428.

Almost surely, 2^491571325 is an apocalyptic number.

It is an amenable number.

491571325 is a deficient number, since it is larger than the sum of its proper divisors (247032195).

491571325 is a wasteful number, since it uses less digits than its factorization.

491571325 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1106 (or 1101 counting only the distinct ones).

The product of its digits is 37800, while the sum is 37.

The square root of 491571325 is about 22171.4078262974. The cubic root of 491571325 is about 789.2153320863.

The spelling of 491571325 in words is "four hundred ninety-one million, five hundred seventy-one thousand, three hundred twenty-five".