22251434 has 4 divisors (see below), whose sum is σ = 33377154. Its totient is φ = 11125716.

The previous prime is 22251421. The next prime is 22251473. The reversal of 22251434 is 43415222.

It is a happy number.

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., 22118209 + 133225 = 4703^2 + 365^2 .

It is a Curzon number.

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, 5562857 + ... + 5562860.

Almost surely, 2^22251434 is an apocalyptic number.

22251434 is a deficient number, since it is larger than the sum of its proper divisors (11125720).

22251434 is a wasteful number, since it uses less digits than its factorization.

22251434 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11125719.

The product of its digits is 1920, while the sum is 23.

The square root of 22251434 is about 4717.1425672752. The cubic root of 22251434 is about 281.2673586652.

Adding to 22251434 its reverse (43415222), we get a palindrome (65666656).

The spelling of 22251434 in words is "twenty-two million, two hundred fifty-one thousand, four hundred thirty-four".