13331521534 has 4 divisors (see below), whose sum is σ = 19997282304. Its totient is φ = 6665760766.

The previous prime is 13331521519. The next prime is 13331521537. The reversal of 13331521534 is 43512513331.

It is a happy number.

13331521534 is digitally balanced in base 5, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 43512513331 = 7 ⋅6216073333.

It is a junction number, because it is equal to n+sod(n) for n = 13331521496 and 13331521505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13331521537) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3332880382 + ... + 3332880385.

It is an arithmetic number, because the mean of its divisors is an integer number (4999320576).

Almost surely, 2^13331521534 is an apocalyptic number.

13331521534 is a deficient number, since it is larger than the sum of its proper divisors (6665760770).

13331521534 is an equidigital number, since it uses as much as digits as its factorization.

13331521534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6665760769.

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

The spelling of 13331521534 in words is "thirteen billion, three hundred thirty-one million, five hundred twenty-one thousand, five hundred thirty-four".