13994321551 has 6 divisors (see below), whose sum is σ = 16279108800. Its totient is φ = 11995132716.

The previous prime is 13994321531. The next prime is 13994321603. The reversal of 13994321551 is 15512349931.

It is not a de Polignac number, because 13994321551 - 2¹⁹ = 13993797263 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13994321498 and 13994321507.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13994321531) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 142799151 + ... + 142799248.

It is an arithmetic number, because the mean of its divisors is an integer number (2713184800).

Almost surely, 2^13994321551 is an apocalyptic number.

13994321551 is a deficient number, since it is larger than the sum of its proper divisors (2284787249).

13994321551 is an equidigital number, since it uses as much as digits as its factorization.

13994321551 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 285598413 (or 285598406 counting only the distinct ones).

The product of its digits is 145800, while the sum is 43.

The spelling of 13994321551 in words is "thirteen billion, nine hundred ninety-four million, three hundred twenty-one thousand, five hundred fifty-one".