13211262431 has 4 divisors (see below), whose sum is σ = 13261495632. Its totient is φ = 13161029232.

The previous prime is 13211262413. The next prime is 13211262437. The reversal of 13211262431 is 13426211231.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13426211231 = 63353 ⋅211927.

It is a cyclic number.

It is not a de Polignac number, because 13211262431 - 2¹⁴ = 13211246047 is a prime.

It is a super-2 number, since 2×13211262431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 13211262431.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13211262437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25116206 + ... + 25116731.

It is an arithmetic number, because the mean of its divisors is an integer number (3315373908).

Almost surely, 2^13211262431 is an apocalyptic number.

13211262431 is a deficient number, since it is larger than the sum of its proper divisors (50233201).

13211262431 is an equidigital number, since it uses as much as digits as its factorization.

13211262431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 50233200.

The product of its digits is 1728, while the sum is 26.

Adding to 13211262431 its reverse (13426211231), we get a palindrome (26637473662).

The spelling of 13211262431 in words is "thirteen billion, two hundred eleven million, two hundred sixty-two thousand, four hundred thirty-one".