16671213 has 24 divisors (see below), whose sum is σ = 26240760. Its totient is φ = 10137600.

The previous prime is 16671209. The next prime is 16671233. The reversal of 16671213 is 31217661.

It can be written as a sum of positive squares in 4 ways, for example, as 2518569 + 14152644 = 1587^2 + 3762^2 .

It is not a de Polignac number, because 16671213 - 2² = 16671209 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16671233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 9613 + ... + 11213.

It is an arithmetic number, because the mean of its divisors is an integer number (1093365).

Almost surely, 2^16671213 is an apocalyptic number.

16671213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

16671213 is a deficient number, since it is larger than the sum of its proper divisors (9569547).

16671213 is a wasteful number, since it uses less digits than its factorization.

16671213 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1709 (or 1706 counting only the distinct ones).

The product of its digits is 1512, while the sum is 27.

The square root of 16671213 is about 4083.0396765155. The cubic root of 16671213 is about 255.4597013404.

Adding to 16671213 its reverse (31217661), we get a palindrome (47888874).

The spelling of 16671213 in words is "sixteen million, six hundred seventy-one thousand, two hundred thirteen".