16538222 has 4 divisors (see below), whose sum is σ = 24807336. Its totient is φ = 8269110.

The previous prime is 16538201. The next prime is 16538233. The reversal of 16538222 is 22283561.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22283561 = 19 ⋅1172819.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4134554 + ... + 4134557.

It is an arithmetic number, because the mean of its divisors is an integer number (6201834).

Almost surely, 2^16538222 is an apocalyptic number.

16538222 is a deficient number, since it is larger than the sum of its proper divisors (8269114).

16538222 is an equidigital number, since it uses as much as digits as its factorization.

16538222 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8269113.

The product of its digits is 5760, while the sum is 29.

The square root of 16538222 is about 4066.7212837862. The cubic root of 16538222 is about 254.7785954662.

The spelling of 16538222 in words is "sixteen million, five hundred thirty-eight thousand, two hundred twenty-two".