130312031 has 4 divisors (see below), whose sum is σ = 131655552. Its totient is φ = 128968512.

The previous prime is 130312019. The next prime is 130312037. The reversal of 130312031 is 130213031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 130213031 = 13 ⋅10016387.

It is a cyclic number.

It is not a de Polignac number, because 130312031 - 2⁶ = 130311967 is a prime.

It is a super-2 number, since 2×130312031² = 33962450846689922, 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 = 130311997 and 130312015.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130312037) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 671615 + ... + 671808.

It is an arithmetic number, because the mean of its divisors is an integer number (32913888).

Almost surely, 2^130312031 is an apocalyptic number.

130312031 is a deficient number, since it is larger than the sum of its proper divisors (1343521).

130312031 is an equidigital number, since it uses as much as digits as its factorization.

130312031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1343520.

The product of its (nonzero) digits is 54, while the sum is 14.

The square root of 130312031 is about 11415.4295144773. The cubic root of 130312031 is about 506.9846820945.

Adding to 130312031 its reverse (130213031), we get a palindrome (260525062).

The spelling of 130312031 in words is "one hundred thirty million, three hundred twelve thousand, thirty-one".