22161455 has 8 divisors (see below), whose sum is σ = 28158192. Its totient is φ = 16686208.

The previous prime is 22161449. The next prime is 22161463. The reversal of 22161455 is 55416122.

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

It is a cyclic number.

It is not a de Polignac number, because 22161455 - 2⁸ = 22161199 is a prime.

It is a super-2 number, since 2×22161455² = 982260175434050, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 130277 + ... + 130446.

It is an arithmetic number, because the mean of its divisors is an integer number (3519774).

Almost surely, 2^22161455 is an apocalyptic number.

22161455 is a deficient number, since it is larger than the sum of its proper divisors (5996737).

22161455 is a wasteful number, since it uses less digits than its factorization.

22161455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260745.

The product of its digits is 2400, while the sum is 26.

The square root of 22161455 is about 4707.5954584055. The cubic root of 22161455 is about 280.8877225228.

Adding to 22161455 its reverse (55416122), we get a palindrome (77577577).

The spelling of 22161455 in words is "twenty-two million, one hundred sixty-one thousand, four hundred fifty-five".