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130421513 = 837715569
BaseRepresentation
bin1111100011000…
…01001100001001
3100002102002200102
413301201030021
5231341442023
620535215145
73142364435
oct761411411
9302362612
10130421513
116768a682
12378174b5
13210355c1
141346d9c5
15b6b3628
hex7c61309

130421513 has 4 divisors (see below), whose sum is σ = 130445460. Its totient is φ = 130397568.

The previous prime is 130421503. The next prime is 130421527. The reversal of 130421513 is 315124031.

Adding to 130421513 its reverse (315124031), we get a palindrome (445545544).

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 315124031 = 1931632767.

It can be written as a sum of positive squares in 2 ways, for example, as 32569849 + 97851664 = 5707^2 + 9892^2 .

It is a cyclic number.

It is not a de Polignac number, because 130421513 - 26 = 130421449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (130421503) 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, 593 + ... + 16161.

It is an arithmetic number, because the mean of its divisors is an integer number (32611365).

Almost surely, 2130421513 is an apocalyptic number.

It is an amenable number.

130421513 is a deficient number, since it is larger than the sum of its proper divisors (23947).

130421513 is an equidigital number, since it uses as much as digits as its factorization.

130421513 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23946.

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 130421513 is about 11420.2238594521. The cubic root of 130421513 is about 507.1266238614.

The spelling of 130421513 in words is "one hundred thirty million, four hundred twenty-one thousand, five hundred thirteen".

Divisors: 1 8377 15569 130421513