13131047 has 4 divisors (see below), whose sum is σ = 13231416. Its totient is φ = 13030680.

The previous prime is 13131037. The next prime is 13131061. The reversal of 13131047 is 74013131.

It is a happy number.

13131047 is digitally balanced in base 2, 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.

It is a cyclic number.

It is not a de Polignac number, because 13131047 - 2⁴ = 13131031 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (13131017) 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, 49988 + ... + 50249.

It is an arithmetic number, because the mean of its divisors is an integer number (3307854).

Almost surely, 2^13131047 is an apocalyptic number.

13131047 is a deficient number, since it is larger than the sum of its proper divisors (100369).

13131047 is a wasteful number, since it uses less digits than its factorization.

13131047 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 100368.

The product of its (nonzero) digits is 252, while the sum is 20.

The square root of 13131047 is about 3623.6786557309. The cubic root of 13131047 is about 235.9209193529.

Adding to 13131047 its reverse (74013131), we get a palindrome (87144178).

The spelling of 13131047 in words is "thirteen million, one hundred thirty-one thousand, forty-seven".