13220155461 has 8 divisors (see below), whose sum is σ = 17690509984. Its totient is φ = 8781618960.

The previous prime is 13220155447. The next prime is 13220155469. The reversal of 13220155461 is 16455102231.

13220155461 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13220155461 - 2¹¹ = 13220153413 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13220155469) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7953535 + ... + 7955196.

It is an arithmetic number, because the mean of its divisors is an integer number (2211313748).

Almost surely, 2^13220155461 is an apocalyptic number.

It is an amenable number.

13220155461 is a deficient number, since it is larger than the sum of its proper divisors (4470354523).

13220155461 is a wasteful number, since it uses less digits than its factorization.

13220155461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15909011.

The product of its (nonzero) digits is 7200, while the sum is 30.

Adding to 13220155461 its reverse (16455102231), we get a palindrome (29675257692).

The spelling of 13220155461 in words is "thirteen billion, two hundred twenty million, one hundred fifty-five thousand, four hundred sixty-one".