491130531 has 12 divisors (see below), whose sum is σ = 709995000. Its totient is φ = 327150720.

The previous prime is 491130511. The next prime is 491130533. The reversal of 491130531 is 135031194.

It is not a de Polignac number, because 491130531 - 2⁹ = 491130019 is a prime.

It is a super-2 number, since 2×491130531² = 482418396960683922, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 491130495 and 491130504.

It is not an unprimeable number, because it can be changed into a prime (491130533) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 10605 + ... + 33086.

It is an arithmetic number, because the mean of its divisors is an integer number (59166250).

Almost surely, 2^491130531 is an apocalyptic number.

491130531 is a deficient number, since it is larger than the sum of its proper divisors (218864469).

491130531 is a wasteful number, since it uses less digits than its factorization.

491130531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44946 (or 44943 counting only the distinct ones).

The product of its (nonzero) digits is 1620, while the sum is 27.

The square root of 491130531 is about 22161.4650012133. The cubic root of 491130531 is about 788.9793640118.

The spelling of 491130531 in words is "four hundred ninety-one million, one hundred thirty thousand, five hundred thirty-one".