13440804431 has 4 divisors (see below), whose sum is σ = 13441169664. Its totient is φ = 13440439200.

The previous prime is 13440804427. The next prime is 13440804437.

13440804431 is nontrivially palindromic in base 10.

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

It is a cyclic number.

It is not a de Polignac number, because 13440804431 - 2² = 13440804427 is a prime.

It is a super-2 number, since 2×13440804431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13440804437) 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, 120335 + ... + 203376.

It is an arithmetic number, because the mean of its divisors is an integer number (3360292416).

Almost surely, 2^13440804431 is an apocalyptic number.

13440804431 is a deficient number, since it is larger than the sum of its proper divisors (365233).

13440804431 is an equidigital number, since it uses as much as digits as its factorization.

13440804431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365232.

The product of its (nonzero) digits is 18432, while the sum is 32.

The spelling of 13440804431 in words is "thirteen billion, four hundred forty million, eight hundred four thousand, four hundred thirty-one".