130543521 has 4 divisors (see below), whose sum is σ = 174058032. Its totient is φ = 87029012.

The previous prime is 130543507. The next prime is 130543541. The reversal of 130543521 is 125345031.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 130543521 - 2⁵ = 130543489 is a prime.

It is a super-2 number, since 2×130543521² = 34083221750154882, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 130543491 and 130543500.

It is not an unprimeable number, because it can be changed into a prime (130543541) 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, 21757251 + ... + 21757256.

It is an arithmetic number, because the mean of its divisors is an integer number (43514508).

Almost surely, 2^130543521 is an apocalyptic number.

It is an amenable number.

130543521 is a deficient number, since it is larger than the sum of its proper divisors (43514511).

130543521 is an equidigital number, since it uses as much as digits as its factorization.

130543521 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43514510.

The product of its (nonzero) digits is 1800, while the sum is 24.

The square root of 130543521 is about 11425.5643624287. The cubic root of 130543521 is about 507.2847118427.

Adding to 130543521 its reverse (125345031), we get a palindrome (255888552).

The spelling of 130543521 in words is "one hundred thirty million, five hundred forty-three thousand, five hundred twenty-one".