13247043531 has 8 divisors (see below), whose sum is σ = 17664146640. Its totient is φ = 8830651392.

The previous prime is 13247043527. The next prime is 13247043533. The reversal of 13247043531 is 13534074231.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 13247043531 - 2² = 13247043527 is a prime.

It is a super-2 number, since 2×13247043531² (a number of 21 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 13247043492 and 13247043501.

It is not an unprimeable number, because it can be changed into a prime (13247043533) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 132630 + ... + 209963.

It is an arithmetic number, because the mean of its divisors is an integer number (2208018330).

Almost surely, 2^13247043531 is an apocalyptic number.

13247043531 is a deficient number, since it is larger than the sum of its proper divisors (4417103109).

13247043531 is a wasteful number, since it uses less digits than its factorization.

13247043531 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 355485.

The product of its (nonzero) digits is 30240, while the sum is 33.

The spelling of 13247043531 in words is "thirteen billion, two hundred forty-seven million, forty-three thousand, five hundred thirty-one".