22011145 has 16 divisors (see below), whose sum is σ = 29428560. Its totient is φ = 15692544.

The previous prime is 22011131. The next prime is 22011149. The reversal of 22011145 is 54111022.

It can be written as a sum of positive squares in 8 ways, for example, as 71289 + 21939856 = 267^2 + 4684^2 .

It is a cyclic number.

It is not a de Polignac number, because 22011145 - 2⁵ = 22011113 is a prime.

It is a super-2 number, since 2×22011145² = 968981008422050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22011149) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3954 + ... + 7723.

It is an arithmetic number, because the mean of its divisors is an integer number (1839285).

Almost surely, 2^22011145 is an apocalyptic number.

It is an amenable number.

22011145 is a deficient number, since it is larger than the sum of its proper divisors (7417415).

22011145 is a wasteful number, since it uses less digits than its factorization.

22011145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11724.

The product of its (nonzero) digits is 80, while the sum is 16.

The square root of 22011145 is about 4691.6036703882. The cubic root of 22011145 is about 280.2512413329.

Adding to 22011145 its reverse (54111022), we get a palindrome (76122167).

The spelling of 22011145 in words is "twenty-two million, eleven thousand, one hundred forty-five".