16261213 has 4 divisors (see below), whose sum is σ = 16269660. Its totient is φ = 16252768.

The previous prime is 16261211. The next prime is 16261237. The reversal of 16261213 is 31216261.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 31216261 = 1789 ⋅17449.

It can be written as a sum of positive squares in 2 ways, for example, as 8543929 + 7717284 = 2923^2 + 2778^2 .

It is a cyclic number.

It is not a de Polignac number, because 16261213 - 2¹ = 16261211 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 (16261211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 231 + ... + 5707.

It is an arithmetic number, because the mean of its divisors is an integer number (4067415).

Almost surely, 2^16261213 is an apocalyptic number.

It is an amenable number.

16261213 is a deficient number, since it is larger than the sum of its proper divisors (8447).

16261213 is an equidigital number, since it uses as much as digits as its factorization.

16261213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8446.

The product of its digits is 432, while the sum is 22.

The square root of 16261213 is about 4032.5194357870. The cubic root of 16261213 is about 253.3480968235.

Adding to 16261213 its reverse (31216261), we get a palindrome (47477474).

The spelling of 16261213 in words is "sixteen million, two hundred sixty-one thousand, two hundred thirteen".