491295131 has 4 divisors (see below), whose sum is σ = 491607072. Its totient is φ = 490983192.

The previous prime is 491295127. The next prime is 491295151. The reversal of 491295131 is 131592194.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 491295131 - 2² = 491295127 is a prime.

It is a super-2 number, since 2×491295131² = 482741811488614322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 491295091 and 491295100.

It is not an unprimeable number, because it can be changed into a prime (491295151) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 153596 + ... + 156761.

It is an arithmetic number, because the mean of its divisors is an integer number (122901768).

Almost surely, 2^491295131 is an apocalyptic number.

491295131 is a deficient number, since it is larger than the sum of its proper divisors (311941).

491295131 is a wasteful number, since it uses less digits than its factorization.

491295131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 311940.

The product of its digits is 9720, while the sum is 35.

The square root of 491295131 is about 22165.1783435189. The cubic root of 491295131 is about 789.0674950278.

The spelling of 491295131 in words is "four hundred ninety-one million, two hundred ninety-five thousand, one hundred thirty-one".