22208481 has 6 divisors (see below), whose sum is σ = 32078930. Its totient is φ = 14805648.

The previous prime is 22208479. The next prime is 22208489. The reversal of 22208481 is 18480222.

It can be written as a sum of positive squares in only one way, i.e., 16941456 + 5267025 = 4116^2 + 2295^2 .

It is not a de Polignac number, because 22208481 - 2¹ = 22208479 is a prime.

It is a super-2 number, since 2×22208481² = 986433256654722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22208489) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 1233796 + ... + 1233813.

Almost surely, 2^22208481 is an apocalyptic number.

It is an amenable number.

22208481 is a deficient number, since it is larger than the sum of its proper divisors (9870449).

22208481 is a wasteful number, since it uses less digits than its factorization.

22208481 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2467615 (or 2467612 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 22208481 is about 4712.5875058189. The cubic root of 22208481 is about 281.0862608404.

It can be divided in two parts, 2220 and 8481, that added together give a palindrome (10701).

The spelling of 22208481 in words is "twenty-two million, two hundred eight thousand, four hundred eighty-one".