13204440431 has 32 divisors (see below), whose sum is σ = 17212285440. Its totient is φ = 9836671104.

The previous prime is 13204440397. The next prime is 13204440433. The reversal of 13204440431 is 13404440231.

It is not a de Polignac number, because 13204440431 - 2⁶ = 13204440367 is a prime.

It is a super-2 number, since 2×13204440431² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 13204440431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13204440433) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 258401 + ... + 305253.

It is an arithmetic number, because the mean of its divisors is an integer number (537883920).

Almost surely, 2^13204440431 is an apocalyptic number.

13204440431 is a deficient number, since it is larger than the sum of its proper divisors (4007845009).

13204440431 is a wasteful number, since it uses less digits than its factorization.

13204440431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47055.

The product of its (nonzero) digits is 4608, while the sum is 26.

Adding to 13204440431 its reverse (13404440231), we get a palindrome (26608880662).

The spelling of 13204440431 in words is "thirteen billion, two hundred four million, four hundred forty thousand, four hundred thirty-one".