22131242 has 12 divisors (see below), whose sum is σ = 38616930. Its totient is φ = 9484776.

The previous prime is 22131223. The next prime is 22131259. The reversal of 22131242 is 24213122.

It can be written as a sum of positive squares in only one way, i.e., 15531481 + 6599761 = 3941^2 + 2569^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 22131242.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 112817 + ... + 113012.

Almost surely, 2^22131242 is an apocalyptic number.

22131242 is a deficient number, since it is larger than the sum of its proper divisors (16485688).

22131242 is a wasteful number, since it uses less digits than its factorization.

22131242 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 225845 (or 225838 counting only the distinct ones).

The product of its digits is 192, while the sum is 17.

The square root of 22131242 is about 4704.3854008786. The cubic root of 22131242 is about 280.7600185092.

Adding to 22131242 its reverse (24213122), we get a palindrome (46344364).

The spelling of 22131242 in words is "twenty-two million, one hundred thirty-one thousand, two hundred forty-two".