2531031491 has 8 divisors (see below), whose sum is σ = 2551893120. Its totient is φ = 2510255232.

The previous prime is 2531031479. The next prime is 2531031497. The reversal of 2531031491 is 1941301352.

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

It is a cyclic number.

It is not a de Polignac number, because 2531031491 - 2¹⁸ = 2530769347 is a prime.

It is a super-2 number, since 2×2531031491² = 12812240816867366162, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2531031497) 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, 38891 + ... + 81083.

It is an arithmetic number, because the mean of its divisors is an integer number (318986640).

Almost surely, 2^2531031491 is an apocalyptic number.

2531031491 is a deficient number, since it is larger than the sum of its proper divisors (20861629).

2531031491 is a wasteful number, since it uses less digits than its factorization.

2531031491 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42685.

The product of its (nonzero) digits is 3240, while the sum is 29.

The square root of 2531031491 is about 50309.3578869776. The cubic root of 2531031491 is about 1362.8012279693.

The spelling of 2531031491 in words is "two billion, five hundred thirty-one million, thirty-one thousand, four hundred ninety-one".