13213256405 has 16 divisors (see below), whose sum is σ = 16245425664. Its totient is φ = 10312375680.

The previous prime is 13213256401. The next prime is 13213256471. The reversal of 13213256405 is 50465231231.

It is a happy number.

It is not a de Polignac number, because 13213256405 - 2² = 13213256401 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13213256401) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 17312 + ... + 163481.

It is an arithmetic number, because the mean of its divisors is an integer number (1015339104).

Almost surely, 2^13213256405 is an apocalyptic number.

It is an amenable number.

13213256405 is a deficient number, since it is larger than the sum of its proper divisors (3032169259).

13213256405 is a wasteful number, since it uses less digits than its factorization.

13213256405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 181156.

The product of its (nonzero) digits is 21600, while the sum is 32.

Adding to 13213256405 its reverse (50465231231), we get a palindrome (63678487636).

The spelling of 13213256405 in words is "thirteen billion, two hundred thirteen million, two hundred fifty-six thousand, four hundred five".