491254131 has 8 divisors (see below), whose sum is σ = 655453120. Its totient is φ = 327278952.

The previous prime is 491254129. The next prime is 491254133. The reversal of 491254131 is 131452194.

It is an interprime number because it is at equal distance from previous prime (491254129) and next prime (491254133).

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 491254131 - 2¹ = 491254129 is a prime.

It is a super-2 number, since 2×491254131² = 482661242449130322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (491254133) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 50761 + ... + 59658.

It is an arithmetic number, because the mean of its divisors is an integer number (81931640).

Almost surely, 2^491254131 is an apocalyptic number.

491254131 is a deficient number, since it is larger than the sum of its proper divisors (164198989).

491254131 is a wasteful number, since it uses less digits than its factorization.

491254131 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111905.

The product of its digits is 4320, while the sum is 30.

The square root of 491254131 is about 22164.2534500939. The cubic root of 491254131 is about 789.0455444288.

The spelling of 491254131 in words is "four hundred ninety-one million, two hundred fifty-four thousand, one hundred thirty-one".