13553321431 has 4 divisors (see below), whose sum is σ = 14595884632. Its totient is φ = 12510758232.

The previous prime is 13553321429. The next prime is 13553321443. The reversal of 13553321431 is 13412335531.

It is a happy number.

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 13553321431 - 2¹ = 13553321429 is a prime.

It is a super-2 number, since 2×13553321431² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 13553321393 and 13553321402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13553331431) 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, 521281581 + ... + 521281606.

It is an arithmetic number, because the mean of its divisors is an integer number (3648971158).

Almost surely, 2^13553321431 is an apocalyptic number.

13553321431 is a deficient number, since it is larger than the sum of its proper divisors (1042563201).

13553321431 is a wasteful number, since it uses less digits than its factorization.

13553321431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1042563200.

The product of its digits is 16200, while the sum is 31.

Adding to 13553321431 its reverse (13412335531), we get a palindrome (26965656962).

The spelling of 13553321431 in words is "thirteen billion, five hundred fifty-three million, three hundred twenty-one thousand, four hundred thirty-one".