22551272 has 8 divisors (see below), whose sum is σ = 42283650. Its totient is φ = 11275632.

The previous prime is 22551251. The next prime is 22551281. The reversal of 22551272 is 27215522.

It can be written as a sum of positive squares in only one way, i.e., 22221796 + 329476 = 4714^2 + 574^2 .

It is a tau number, because it is divible by the number of its divisors (8).

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 as a sum of consecutive naturals, namely, 1409447 + ... + 1409462.

Almost surely, 2^22551272 is an apocalyptic number.

It is an amenable number.

22551272 is a deficient number, since it is larger than the sum of its proper divisors (19732378).

22551272 is a wasteful number, since it uses less digits than its factorization.

22551272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2818915 (or 2818911 counting only the distinct ones).

The product of its digits is 2800, while the sum is 26.

The square root of 22551272 is about 4748.8179581871. The cubic root of 22551272 is about 282.5250850933.

Adding to 22551272 its reverse (27215522), we get a palindrome (49766794).

The spelling of 22551272 in words is "twenty-two million, five hundred fifty-one thousand, two hundred seventy-two".