40722565 has 32 divisors (see below), whose sum is σ = 56337120. Its totient is φ = 27992064.

The previous prime is 40722559. The next prime is 40722569. The reversal of 40722565 is 56522704.

It can be written as a sum of positive squares in 16 ways, for example, as 18122049 + 22600516 = 4257^2 + 4754^2 .

It is not a de Polignac number, because 40722565 - 2⁹ = 40722053 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (40722569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 151251 + ... + 151519.

It is an arithmetic number, because the mean of its divisors is an integer number (1760535).

Almost surely, 2^40722565 is an apocalyptic number.

It is an amenable number.

40722565 is a deficient number, since it is larger than the sum of its proper divisors (15614555).

40722565 is a wasteful number, since it uses less digits than its factorization.

40722565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441.

The product of its (nonzero) digits is 16800, while the sum is 31.

The square root of 40722565 is about 6381.4234305522. The cubic root of 40722565 is about 344.0421938735.

The spelling of 40722565 in words is "forty million, seven hundred twenty-two thousand, five hundred sixty-five".