16213913 has 4 divisors (see below), whose sum is σ = 16222080. Its totient is φ = 16205748.

The previous prime is 16213853. The next prime is 16213921. The reversal of 16213913 is 31931261.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 16213913 - 2⁸ = 16213657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (16213943) 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, 1028 + ... + 5786.

It is an arithmetic number, because the mean of its divisors is an integer number (4055520).

Almost surely, 2^16213913 is an apocalyptic number.

It is an amenable number.

16213913 is a deficient number, since it is larger than the sum of its proper divisors (8167).

16213913 is an equidigital number, since it uses as much as digits as its factorization.

16213913 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8166.

The product of its digits is 972, while the sum is 26.

The square root of 16213913 is about 4026.6503448897. The cubic root of 16213913 is about 253.1022151518.

The spelling of 16213913 in words is "sixteen million, two hundred thirteen thousand, nine hundred thirteen".