22101445 has 8 divisors (see below), whose sum is σ = 28081944. Its totient is φ = 16641024.

The previous prime is 22101439. The next prime is 22101449. The reversal of 22101445 is 54410122.

It can be written as a sum of positive squares in 4 ways, for example, as 2405601 + 19695844 = 1551^2 + 4438^2 .

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 22101445 - 2³ = 22101437 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 (22101449) 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 7 ways as a sum of consecutive naturals, for example, 129924 + ... + 130093.

It is an arithmetic number, because the mean of its divisors is an integer number (3510243).

Almost surely, 2^22101445 is an apocalyptic number.

It is an amenable number.

22101445 is a deficient number, since it is larger than the sum of its proper divisors (5980499).

22101445 is a wasteful number, since it uses less digits than its factorization.

22101445 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 260039.

The product of its (nonzero) digits is 320, while the sum is 19.

The square root of 22101445 is about 4701.2173955264. The cubic root of 22101445 is about 280.6339589536.

Adding to 22101445 its reverse (54410122), we get a palindrome (76511567).

It can be divided in two parts, 2210 and 1445, that added together give a triangular number (3655 = T₈₅).

The spelling of 22101445 in words is "twenty-two million, one hundred one thousand, four hundred forty-five".