22512242 has 4 divisors (see below), whose sum is σ = 33768366. Its totient is φ = 11256120.

The previous prime is 22512229. The next prime is 22512247. The reversal of 22512242 is 24221522.

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., 22174681 + 337561 = 4709^2 + 581^2 .

It is not an unprimeable number, because it can be changed into a prime (22512247) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5628059 + ... + 5628062.

Almost surely, 2^22512242 is an apocalyptic number.

22512242 is a deficient number, since it is larger than the sum of its proper divisors (11256124).

22512242 is a wasteful number, since it uses less digits than its factorization.

22512242 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11256123.

The product of its digits is 640, while the sum is 20.

The square root of 22512242 is about 4744.7067348784. The cubic root of 22512242 is about 282.3620001059.

Adding to 22512242 its reverse (24221522), we get a palindrome (46733764).

The spelling of 22512242 in words is "twenty-two million, five hundred twelve thousand, two hundred forty-two".