13431334442 has 4 divisors (see below), whose sum is σ = 20147001666. Its totient is φ = 6715667220.

The previous prime is 13431334439. The next prime is 13431334447. The reversal of 13431334442 is 24443313431.

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

It can be written as a sum of positive squares in only one way, i.e., 8715902881 + 4715431561 = 93359^2 + 68669^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13431334399 and 13431334408.

It is not an unprimeable number, because it can be changed into a prime (13431334447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3357833609 + ... + 3357833612.

Almost surely, 2^13431334442 is an apocalyptic number.

13431334442 is a deficient number, since it is larger than the sum of its proper divisors (6715667224).

13431334442 is an equidigital number, since it uses as much as digits as its factorization.

13431334442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6715667223.

The product of its digits is 41472, while the sum is 32.

Adding to 13431334442 its reverse (24443313431), we get a palindrome (37874647873).

The spelling of 13431334442 in words is "thirteen billion, four hundred thirty-one million, three hundred thirty-four thousand, four hundred forty-two".