13251420305 has 4 divisors (see below), whose sum is σ = 15901704372. Its totient is φ = 10601136240.

The previous prime is 13251420289. The next prime is 13251420313. The reversal of 13251420305 is 50302415231.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 9807138961 + 3444281344 = 99031^2 + 58688^2 .

It is not a de Polignac number, because 13251420305 - 2⁴ = 13251420289 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1325142026 + ... + 1325142035.

It is an arithmetic number, because the mean of its divisors is an integer number (3975426093).

Almost surely, 2^13251420305 is an apocalyptic number.

It is an amenable number.

13251420305 is a deficient number, since it is larger than the sum of its proper divisors (2650284067).

13251420305 is an equidigital number, since it uses as much as digits as its factorization.

13251420305 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2650284066.

The product of its (nonzero) digits is 3600, while the sum is 26.

Adding to 13251420305 its reverse (50302415231), we get a palindrome (63553835536).

The spelling of 13251420305 in words is "thirteen billion, two hundred fifty-one million, four hundred twenty thousand, three hundred five".