22506545 has 24 divisors (see below), whose sum is σ = 29361384. Its totient is φ = 16547328.

The previous prime is 22506541. The next prime is 22506569. The reversal of 22506545 is 54560522.

It can be written as a sum of positive squares in 4 ways, for example, as 3904576 + 18601969 = 1976^2 + 4313^2 .

It is not a de Polignac number, because 22506545 - 2² = 22506541 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22506541) 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 23 ways as a sum of consecutive naturals, for example, 66617 + ... + 66953.

It is an arithmetic number, because the mean of its divisors is an integer number (1223391).

Almost surely, 2^22506545 is an apocalyptic number.

It is an amenable number.

22506545 is a deficient number, since it is larger than the sum of its proper divisors (6854839).

22506545 is a wasteful number, since it uses less digits than its factorization.

22506545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 417 (or 398 counting only the distinct ones).

The product of its (nonzero) digits is 12000, while the sum is 29.

The square root of 22506545 is about 4744.1063436647. The cubic root of 22506545 is about 282.3381797030.

The spelling of 22506545 in words is "twenty-two million, five hundred six thousand, five hundred forty-five".