16223639 has 4 divisors (see below), whose sum is σ = 16287024. Its totient is φ = 16160256.

The previous prime is 16223629. The next prime is 16223651. The reversal of 16223639 is 93632261.

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 16223639 - 2¹² = 16219543 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 (16223609) 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, 31307 + ... + 31820.

It is an arithmetic number, because the mean of its divisors is an integer number (4071756).

Almost surely, 2^16223639 is an apocalyptic number.

16223639 is a deficient number, since it is larger than the sum of its proper divisors (63385).

16223639 is an equidigital number, since it uses as much as digits as its factorization.

16223639 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 63384.

The product of its digits is 11664, while the sum is 32.

The square root of 16223639 is about 4027.8578674030. The cubic root of 16223639 is about 253.1528132624.

The spelling of 16223639 in words is "sixteen million, two hundred twenty-three thousand, six hundred thirty-nine".