22040145 has 24 divisors (see below), whose sum is σ = 39522600. Its totient is φ = 11348736.

The previous prime is 22040113. The next prime is 22040147. The reversal of 22040145 is 54104022.

22040145 is a `hidden beast` number, since 220 + 401 + 45 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 25281 + 22014864 = 159^2 + 4692^2 .

It is not a de Polignac number, because 22040145 - 2⁵ = 22040113 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22040147) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 7140 + ... + 9749.

It is an arithmetic number, because the mean of its divisors is an integer number (1646775).

Almost surely, 2^22040145 is an apocalyptic number.

It is an amenable number.

22040145 is a deficient number, since it is larger than the sum of its proper divisors (17482455).

22040145 is a wasteful number, since it uses less digits than its factorization.

22040145 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16929 (or 16926 counting only the distinct ones).

The product of its (nonzero) digits is 320, while the sum is 18.

The square root of 22040145 is about 4694.6932807160. The cubic root of 22040145 is about 280.3742656665.

Adding to 22040145 its reverse (54104022), we get a palindrome (76144167).

The spelling of 22040145 in words is "twenty-two million, forty thousand, one hundred forty-five".