16131206213 has 4 divisors (see below), whose sum is σ = 16290921228. Its totient is φ = 15971491200.

The previous prime is 16131206209. The next prime is 16131206219. The reversal of 16131206213 is 31260213161.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 8707315969 + 7423890244 = 93313^2 + 86162^2 .

It is a cyclic number.

It is not a de Polignac number, because 16131206213 - 2² = 16131206209 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 (16131206219) 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, 79857356 + ... + 79857557.

It is an arithmetic number, because the mean of its divisors is an integer number (4072730307).

Almost surely, 2^16131206213 is an apocalyptic number.

It is an amenable number.

16131206213 is a deficient number, since it is larger than the sum of its proper divisors (159715015).

16131206213 is a wasteful number, since it uses less digits than its factorization.

16131206213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159715014.

The product of its (nonzero) digits is 1296, while the sum is 26.

Adding to 16131206213 its reverse (31260213161), we get a palindrome (47391419374).

The spelling of 16131206213 in words is "sixteen billion, one hundred thirty-one million, two hundred six thousand, two hundred thirteen".