13531323451 has 4 divisors (see below), whose sum is σ = 14327283672. Its totient is φ = 12735363232.

The previous prime is 13531323431. The next prime is 13531323467. The reversal of 13531323451 is 15432313531.

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 13531323451 - 2⁹ = 13531322939 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (13531323431) 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, 397980085 + ... + 397980118.

It is an arithmetic number, because the mean of its divisors is an integer number (3581820918).

Almost surely, 2^13531323451 is an apocalyptic number.

13531323451 is a deficient number, since it is larger than the sum of its proper divisors (795960221).

13531323451 is an equidigital number, since it uses as much as digits as its factorization.

13531323451 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 795960220.

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

Adding to 13531323451 its reverse (15432313531), we get a palindrome (28963636982).

The spelling of 13531323451 in words is "thirteen billion, five hundred thirty-one million, three hundred twenty-three thousand, four hundred fifty-one".