22481455 has 4 divisors (see below), whose sum is σ = 26977752. Its totient is φ = 17985160.

The previous prime is 22481453. The next prime is 22481507. The reversal of 22481455 is 55418422.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55418422 = 2 ⋅27709211.

It is not a de Polignac number, because 22481455 - 2¹ = 22481453 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22481453) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 2248141 + ... + 2248150.

It is an arithmetic number, because the mean of its divisors is an integer number (6744438).

Almost surely, 2^22481455 is an apocalyptic number.

22481455 is a deficient number, since it is larger than the sum of its proper divisors (4496297).

22481455 is an equidigital number, since it uses as much as digits as its factorization.

22481455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4496296.

The product of its digits is 12800, while the sum is 31.

The square root of 22481455 is about 4741.4612726458. The cubic root of 22481455 is about 282.2332250643.

Adding to 22481455 its reverse (55418422), we get a palindrome (77899877).

The spelling of 22481455 in words is "twenty-two million, four hundred eighty-one thousand, four hundred fifty-five".