22122442 has 4 divisors (see below), whose sum is σ = 33183666. Its totient is φ = 11061220.

The previous prime is 22122427. The next prime is 22122461. The reversal of 22122442 is 24422122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 24422122 = 2 ⋅12211061.

It can be written as a sum of positive squares in only one way, i.e., 21911761 + 210681 = 4681^2 + 459^2 .

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, 5530609 + ... + 5530612.

Almost surely, 2^22122442 is an apocalyptic number.

22122442 is a deficient number, since it is larger than the sum of its proper divisors (11061224).

22122442 is a wasteful number, since it uses less digits than its factorization.

22122442 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11061223.

The product of its digits is 512, while the sum is 19.

The square root of 22122442 is about 4703.4500103647. The cubic root of 22122442 is about 280.7228009006.

Adding to 22122442 its reverse (24422122), we get a palindrome (46544564).

The spelling of 22122442 in words is "twenty-two million, one hundred twenty-two thousand, four hundred forty-two".