22277145 has 64 divisors (see below), whose sum is σ = 41368320. Its totient is φ = 10137600.

The previous prime is 22277137. The next prime is 22277147. The reversal of 22277145 is 54177222.

It is not a de Polignac number, because 22277145 - 2³ = 22277137 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22277147) 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 63 ways as a sum of consecutive naturals, for example, 250261 + ... + 250349.

It is an arithmetic number, because the mean of its divisors is an integer number (646380).

Almost surely, 2^22277145 is an apocalyptic number.

It is an amenable number.

22277145 is a deficient number, since it is larger than the sum of its proper divisors (19091175).

22277145 is a wasteful number, since it uses less digits than its factorization.

22277145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 186.

The product of its digits is 7840, while the sum is 30.

The square root of 22277145 is about 4719.8670532124. The cubic root of 22277145 is about 281.3756495362.

It can be divided in two parts, 22277 and 145, that added together give a palindrome (22422).

The spelling of 22277145 in words is "twenty-two million, two hundred seventy-seven thousand, one hundred forty-five".