130500521 has 2 divisors, whose sum is σ = 130500522. Its totient is φ = 130500520.

The previous prime is 130500511. The next prime is 130500563. The reversal of 130500521 is 125005031.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 107412496 + 23088025 = 10364^2 + 4805^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-130500521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 130500521.

It is not a weakly prime, because it can be changed into another prime (130500511) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 65250260 + 65250261.

It is an arithmetic number, because the mean of its divisors is an integer number (65250261).

Almost surely, 2^130500521 is an apocalyptic number.

It is an amenable number.

130500521 is a deficient number, since it is larger than the sum of its proper divisors (1).

130500521 is an equidigital number, since it uses as much as digits as its factorization.

130500521 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 150, while the sum is 17.

The square root of 130500521 is about 11423.6824623236. The cubic root of 130500521 is about 507.2290072064.

Adding to 130500521 its reverse (125005031), we get a palindrome (255505552).

The spelling of 130500521 in words is "one hundred thirty million, five hundred thousand, five hundred twenty-one".