22125645 has 24 divisors (see below), whose sum is σ = 39078936. Its totient is φ = 11576448.

The previous prime is 22125629. The next prime is 22125647. The reversal of 22125645 is 54652122.

22125645 is a `hidden beast` number, since 2 + 2 + 12 + 5 + 645 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 7241481 + 14884164 = 2691^2 + 3858^2 .

It is not a de Polignac number, because 22125645 - 2⁴ = 22125629 is a prime.

It is a super-3 number, since 3×22125645³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22125647) 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, 2254 + ... + 7023.

It is an arithmetic number, because the mean of its divisors is an integer number (1628289).

Almost surely, 2^22125645 is an apocalyptic number.

It is an amenable number.

22125645 is a deficient number, since it is larger than the sum of its proper divisors (16953291).

22125645 is a wasteful number, since it uses less digits than its factorization.

22125645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9341 (or 9338 counting only the distinct ones).

The product of its digits is 4800, while the sum is 27.

The square root of 22125645 is about 4703.7904927835. The cubic root of 22125645 is about 280.7363484065.

Adding to 22125645 its reverse (54652122), we get a palindrome (76777767).

The spelling of 22125645 in words is "twenty-two million, one hundred twenty-five thousand, six hundred forty-five".