22254581 has 4 divisors (see below), whose sum is σ = 23563692. Its totient is φ = 20945472.

The previous prime is 22254577. The next prime is 22254601. The reversal of 22254581 is 18545222.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 14364100 + 7890481 = 3790^2 + 2809^2 .

It is a cyclic number.

It is not a de Polignac number, because 22254581 - 2² = 22254577 is a prime.

It is a super-2 number, since 2×22254581² = 990532750971122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22254511) 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, 654530 + ... + 654563.

It is an arithmetic number, because the mean of its divisors is an integer number (5890923).

Almost surely, 2^22254581 is an apocalyptic number.

It is an amenable number.

22254581 is a deficient number, since it is larger than the sum of its proper divisors (1309111).

22254581 is a wasteful number, since it uses less digits than its factorization.

22254581 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1309110.

The product of its digits is 6400, while the sum is 29.

The square root of 22254581 is about 4717.4761260657. The cubic root of 22254581 is about 281.2806178354.

The spelling of 22254581 in words is "twenty-two million, two hundred fifty-four thousand, five hundred eighty-one".