130521031 has 4 divisors (see below), whose sum is σ = 130670064. Its totient is φ = 130372000.

The previous prime is 130521011. The next prime is 130521047. The reversal of 130521031 is 130125031.

130521031 is nontrivially palindromic in base 16.

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 130521031 - 2¹⁹ = 129996743 is a prime.

It is a super-2 number, since 2×130521031² = 34071479066605922, 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 = 130520996 and 130521014.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (130521011) 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, 73195 + ... + 74956.

It is an arithmetic number, because the mean of its divisors is an integer number (32667516).

Almost surely, 2^130521031 is an apocalyptic number.

130521031 is a deficient number, since it is larger than the sum of its proper divisors (149033).

130521031 is an equidigital number, since it uses as much as digits as its factorization.

130521031 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 149032.

The product of its (nonzero) digits is 90, while the sum is 16.

The square root of 130521031 is about 11424.5801235757. The cubic root of 130521031 is about 507.2555785486.

Adding to 130521031 its reverse (130125031), we get a palindrome (260646062).

The spelling of 130521031 in words is "one hundred thirty million, five hundred twenty-one thousand, thirty-one".