13531212013 has 4 divisors (see below), whose sum is σ = 14761322208. Its totient is φ = 12301101820.

The previous prime is 13531211971. The next prime is 13531212047. The reversal of 13531212013 is 31021213531.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-13531212013 is a prime.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13531222013) 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, 615055081 + ... + 615055102.

It is an arithmetic number, because the mean of its divisors is an integer number (3690330552).

Almost surely, 2^13531212013 is an apocalyptic number.

It is an amenable number.

13531212013 is a deficient number, since it is larger than the sum of its proper divisors (1230110195).

13531212013 is a wasteful number, since it uses less digits than its factorization.

13531212013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1230110194.

The product of its (nonzero) digits is 540, while the sum is 22.

Adding to 13531212013 its reverse (31021213531), we get a palindrome (44552425544).

The spelling of 13531212013 in words is "thirteen billion, five hundred thirty-one million, two hundred twelve thousand, thirteen".