22142455 has 4 divisors (see below), whose sum is σ = 26570952. Its totient is φ = 17713960.

The previous prime is 22142447. The next prime is 22142459. The reversal of 22142455 is 55424122.

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

It is not a de Polignac number, because 22142455 - 2³ = 22142447 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 (22142459) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214241 + ... + 2214250.

It is an arithmetic number, because the mean of its divisors is an integer number (6642738).

Almost surely, 2^22142455 is an apocalyptic number.

22142455 is a deficient number, since it is larger than the sum of its proper divisors (4428497).

22142455 is an equidigital number, since it uses as much as digits as its factorization.

22142455 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4428496.

The product of its digits is 3200, while the sum is 25.

The square root of 22142455 is about 4705.5770103145. The cubic root of 22142455 is about 280.8074270633.

Adding to 22142455 its reverse (55424122), we get a palindrome (77566577).

The spelling of 22142455 in words is "twenty-two million, one hundred forty-two thousand, four hundred fifty-five".