13831878431 has 8 divisors (see below), whose sum is σ = 15838206624. Its totient is φ = 11833136640.

The previous prime is 13831878427. The next prime is 13831878433. The reversal of 13831878431 is 13487813831.

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 13831878431 - 2² = 13831878427 is a prime.

It is a super-2 number, since 2×13831878431² (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 (13831878433) 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, 1892690 + ... + 1899983.

It is an arithmetic number, because the mean of its divisors is an integer number (1979775828).

Almost surely, 2^13831878431 is an apocalyptic number.

13831878431 is a deficient number, since it is larger than the sum of its proper divisors (2006328193).

13831878431 is an equidigital number, since it uses as much as digits as its factorization.

13831878431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3793201.

The product of its digits is 387072, while the sum is 47.

The spelling of 13831878431 in words is "thirteen billion, eight hundred thirty-one million, eight hundred seventy-eight thousand, four hundred thirty-one".