22145530 has 32 divisors (see below), whose sum is σ = 43908480. Its totient is φ = 7974720.

The previous prime is 22145521. The next prime is 22145533. The reversal of 22145530 is 3554122.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (22145533) 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, 11067 + ... + 12913.

It is an arithmetic number, because the mean of its divisors is an integer number (1372140).

Almost surely, 2^22145530 is an apocalyptic number.

22145530 is a deficient number, since it is larger than the sum of its proper divisors (21762950).

22145530 is a wasteful number, since it uses less digits than its factorization.

22145530 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1974.

The product of its (nonzero) digits is 1200, while the sum is 22.

The square root of 22145530 is about 4705.9037389220. The cubic root of 22145530 is about 280.8204253641.

Adding to 22145530 its reverse (3554122), we get a palindrome (25699652).

It can be divided in two parts, 2214 and 5530, that added together give a square (7744 = 88²).

The spelling of 22145530 in words is "twenty-two million, one hundred forty-five thousand, five hundred thirty".