22724545 has 16 divisors (see below), whose sum is σ = 28751760. Its totient is φ = 17215744.

The previous prime is 22724543. The next prime is 22724557. The reversal of 22724545 is 54542722.

It can be written as a sum of positive squares in 8 ways, for example, as 294849 + 22429696 = 543^2 + 4736^2 .

It is a cyclic number.

It is not a de Polignac number, because 22724545 - 2¹ = 22724543 is a prime.

It is not an unprimeable number, because it can be changed into a prime (22724543) 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, 6207 + ... + 9163.

It is an arithmetic number, because the mean of its divisors is an integer number (1796985).

Almost surely, 2^22724545 is an apocalyptic number.

It is an amenable number.

22724545 is a deficient number, since it is larger than the sum of its proper divisors (6027215).

22724545 is a wasteful number, since it uses less digits than its factorization.

22724545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3044.

The product of its digits is 22400, while the sum is 31.

The square root of 22724545 is about 4767.0268511935. The cubic root of 22724545 is about 283.2468348029.

It can be divided in two parts, 2272 and 4545, that multiplied together give a triangular number (10326240 = T₄₅₄₄).

The spelling of 22724545 in words is "twenty-two million, seven hundred twenty-four thousand, five hundred forty-five".