16222538 has 4 divisors (see below), whose sum is σ = 24333810. Its totient is φ = 8111268.

The previous prime is 16222529. The next prime is 16222541. The reversal of 16222538 is 83522261.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 15155449 + 1067089 = 3893^2 + 1033^2 .

It is a super-2 number, since 2×16222538² = 526341478322888, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 16222538.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4055633 + ... + 4055636.

Almost surely, 2^16222538 is an apocalyptic number.

16222538 is a deficient number, since it is larger than the sum of its proper divisors (8111272).

16222538 is an equidigital number, since it uses as much as digits as its factorization.

16222538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8111271.

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

The square root of 16222538 is about 4027.7211919397. The cubic root of 16222538 is about 253.1470864841.

Adding to 16222538 its reverse (83522261), we get a palindrome (99744799).

It can be divided in two parts, 1622253 and 8, that added together give a palindrome (1622261).

The spelling of 16222538 in words is "sixteen million, two hundred twenty-two thousand, five hundred thirty-eight".