13404143231 has 4 divisors (see below), whose sum is σ = 13444639464. Its totient is φ = 13363647000.

The previous prime is 13404143209. The next prime is 13404143299. The reversal of 13404143231 is 13234140431.

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: 13234140431 = 113 ⋅117116287.

It is a cyclic number.

It is not a de Polignac number, because 13404143231 - 2¹⁴ = 13404126847 is a prime.

It is a super-2 number, since 2×13404143231² (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 13404143231.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13404143201) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20247620 + ... + 20248281.

It is an arithmetic number, because the mean of its divisors is an integer number (3361159866).

Almost surely, 2^13404143231 is an apocalyptic number.

13404143231 is a deficient number, since it is larger than the sum of its proper divisors (40496233).

13404143231 is an equidigital number, since it uses as much as digits as its factorization.

13404143231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 40496232.

The product of its (nonzero) digits is 3456, while the sum is 26.

Adding to 13404143231 its reverse (13234140431), we get a palindrome (26638283662).

The spelling of 13404143231 in words is "thirteen billion, four hundred four million, one hundred forty-three thousand, two hundred thirty-one".