13131423434 has 4 divisors (see below), whose sum is σ = 19697135154. Its totient is φ = 6565711716.

The previous prime is 13131423421. The next prime is 13131423439. The reversal of 13131423434 is 43432413131.

It is a happy number.

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., 7217352025 + 5914071409 = 84955^2 + 76903^2 .

It is a junction number, because it is equal to n+sod(n) for n = 13131423397 and 13131423406.

It is not an unprimeable number, because it can be changed into a prime (13131423439) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3282855857 + ... + 3282855860.

Almost surely, 2^13131423434 is an apocalyptic number.

13131423434 is a deficient number, since it is larger than the sum of its proper divisors (6565711720).

13131423434 is an equidigital number, since it uses as much as digits as its factorization.

13131423434 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6565711719.

The product of its digits is 10368, while the sum is 29.

Adding to 13131423434 its reverse (43432413131), we get a palindrome (56563836565).

The spelling of 13131423434 in words is "thirteen billion, one hundred thirty-one million, four hundred twenty-three thousand, four hundred thirty-four".