22251560 has 16 divisors (see below), whose sum is σ = 50066100. Its totient is φ = 8900608.

The previous prime is 22251533. The next prime is 22251569. The reversal of 22251560 is 6515222.

It can be written as a sum of positive squares in 2 ways, for example, as 21215236 + 1036324 = 4606^2 + 1018^2 .

It is not an unprimeable number, because it can be changed into a prime (22251569) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 278105 + ... + 278184.

Almost surely, 2^22251560 is an apocalyptic number.

22251560 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

22251560 is an abundant number, since it is smaller than the sum of its proper divisors (27814540).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22251560 is a wasteful number, since it uses less digits than its factorization.

22251560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 556300 (or 556296 counting only the distinct ones).

The product of its (nonzero) digits is 1200, while the sum is 23.

The square root of 22251560 is about 4717.1559227992. The cubic root of 22251560 is about 281.2678895617.

Adding to 22251560 its reverse (6515222), we get a palindrome (28766782).

The spelling of 22251560 in words is "twenty-two million, two hundred fifty-one thousand, five hundred sixty".