13819945531 has 8 divisors (see below), whose sum is σ = 16480929024. Its totient is φ = 11330638440.

The previous prime is 13819945511. The next prime is 13819945537. The reversal of 13819945531 is 13554991831.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 13819945531 - 2²⁹ = 13283074619 is a prime.

It is a super-2 number, since 2×13819945531² (a number of 21 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (13819945537) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42918925 + ... + 42919246.

It is an arithmetic number, because the mean of its divisors is an integer number (2060116128).

Almost surely, 2^13819945531 is an apocalyptic number.

13819945531 is a deficient number, since it is larger than the sum of its proper divisors (2660983493).

13819945531 is an equidigital number, since it uses as much as digits as its factorization.

13819945531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85838201.

The product of its digits is 583200, while the sum is 49.

The spelling of 13819945531 in words is "thirteen billion, eight hundred nineteen million, nine hundred forty-five thousand, five hundred thirty-one".