13220254615 has 4 divisors (see below), whose sum is σ = 15864305544. Its totient is φ = 10576203688.

The previous prime is 13220254603. The next prime is 13220254721. The reversal of 13220254615 is 51645202231.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13220254615 is a prime.

It is a Duffinian number.

It is a congruent 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, 1322025457 + ... + 1322025466.

It is an arithmetic number, because the mean of its divisors is an integer number (3966076386).

Almost surely, 2^13220254615 is an apocalyptic number.

13220254615 is a deficient number, since it is larger than the sum of its proper divisors (2644050929).

13220254615 is an equidigital number, since it uses as much as digits as its factorization.

13220254615 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2644050928.

The product of its (nonzero) digits is 14400, while the sum is 31.

Adding to 13220254615 its reverse (51645202231), we get a palindrome (64865456846).

The spelling of 13220254615 in words is "thirteen billion, two hundred twenty million, two hundred fifty-four thousand, six hundred fifteen".