22215455 has 8 divisors (see below), whose sum is σ = 26923104. Its totient is φ = 17596000.

The previous prime is 22215409. The next prime is 22215491. The reversal of 22215455 is 55451222.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 22215455 - 2¹⁸ = 21953311 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 21491 + ... + 22500.

It is an arithmetic number, because the mean of its divisors is an integer number (3365388).

Almost surely, 2^22215455 is an apocalyptic number.

22215455 is a deficient number, since it is larger than the sum of its proper divisors (4707649).

22215455 is a wasteful number, since it uses less digits than its factorization.

22215455 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44097.

The product of its digits is 4000, while the sum is 26.

The square root of 22215455 is about 4713.3273809486. The cubic root of 22215455 is about 281.1156803885.

Adding to 22215455 its reverse (55451222), we get a palindrome (77666677).

The spelling of 22215455 in words is "twenty-two million, two hundred fifteen thousand, four hundred fifty-five".