130831 has 4 divisors (see below), whose sum is σ = 134064. Its totient is φ = 127600.

The previous prime is 130829. The next prime is 130841. The reversal of 130831 is 138031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 138031 = 97 ⋅1423.

It is a cyclic number.

It is not a de Polignac number, because 130831 - 2¹ = 130829 is a prime.

It is a super-2 number, since 2×130831² = 34233501122, which contains 22 as substring.

It is a Duffinian number.

It is a zygodrome in base 2.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1555 + ... + 1636.

It is an arithmetic number, because the mean of its divisors is an integer number (33516).

2¹³⁰⁸³¹ is an apocalyptic number.

130831 is a deficient number, since it is larger than the sum of its proper divisors (3233).

130831 is an equidigital number, since it uses as much as digits as its factorization.

130831 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3232.

The product of its (nonzero) digits is 72, while the sum is 16.

The square root of 130831 is about 361.7056814594. The cubic root of 130831 is about 50.7656814523.

Adding to 130831 its reverse (138031), we get a palindrome (268862).

It can be divided in two parts, 130 and 831, that added together give a square (961 = 31²).

The spelling of 130831 in words is "one hundred thirty thousand, eight hundred thirty-one".