16223538 has 16 divisors (see below), whose sum is σ = 33324480. Its totient is φ = 5261616.

The previous prime is 16223531. The next prime is 16223539. The reversal of 16223538 is 83532261.

It is not an unprimeable number, because it can be changed into a prime (16223531) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 36318 + ... + 36761.

It is an arithmetic number, because the mean of its divisors is an integer number (2082780).

Almost surely, 2^16223538 is an apocalyptic number.

16223538 is an abundant number, since it is smaller than the sum of its proper divisors (17100942).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

16223538 is a wasteful number, since it uses less digits than its factorization.

16223538 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 73121.

The product of its digits is 8640, while the sum is 30.

The square root of 16223538 is about 4027.8453297017. The cubic root of 16223538 is about 253.1522879284.

Adding to 16223538 its reverse (83532261), we get a palindrome (99755799).

It can be divided in two parts, 16223 and 538, that added together give a palindrome (16761).

The spelling of 16223538 in words is "sixteen million, two hundred twenty-three thousand, five hundred thirty-eight".