Search a number
-
+
13030221013 = 17766483589
BaseRepresentation
bin11000010001010100…
…10110010011010101
31020122002122210220021
430020222112103111
5203141214033023
65552550505141
7640621023355
oct141052262325
936562583807
1013030221013
1155872469a7
1226379651b1
1312c8723464
148b8794b65
15513e2135d
hex308a964d5

13030221013 has 4 divisors (see below), whose sum is σ = 13796704620. Its totient is φ = 12263737408.

The previous prime is 13030220971. The next prime is 13030221019. The reversal of 13030221013 is 31012203031.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 31012203031 = 61508396771.

It can be written as a sum of positive squares in 2 ways, for example, as 7789474564 + 5240746449 = 88258^2 + 72393^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2k-13030221013 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13030221019) 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, 383241778 + ... + 383241811.

It is an arithmetic number, because the mean of its divisors is an integer number (3449176155).

Almost surely, 213030221013 is an apocalyptic number.

It is an amenable number.

13030221013 is a deficient number, since it is larger than the sum of its proper divisors (766483607).

13030221013 is an equidigital number, since it uses as much as digits as its factorization.

13030221013 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 766483606.

The product of its (nonzero) digits is 108, while the sum is 16.

Adding to 13030221013 its reverse (31012203031), we get a palindrome (44042424044).

The spelling of 13030221013 in words is "thirteen billion, thirty million, two hundred twenty-one thousand, thirteen".

Divisors: 1 17 766483589 13030221013