40220545 has 4 divisors (see below), whose sum is σ = 48264660. Its totient is φ = 32176432.

The previous prime is 40220527. The next prime is 40220561. The reversal of 40220545 is 54502204.

40220545 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 26255376 + 13965169 = 5124^2 + 3737^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220545 - 2⁵ = 40220513 is a prime.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 4022050 + ... + 4022059.

It is an arithmetic number, because the mean of its divisors is an integer number (12066165).

Almost surely, 2^40220545 is an apocalyptic number.

It is an amenable number.

40220545 is a deficient number, since it is larger than the sum of its proper divisors (8044115).

40220545 is an equidigital number, since it uses as much as digits as its factorization.

40220545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8044114.

The product of its (nonzero) digits is 1600, while the sum is 22.

The square root of 40220545 is about 6341.9669661707. The cubic root of 40220545 is about 342.6225820834.

Adding to 40220545 its reverse (54502204), we get a palindrome (94722749).

The spelling of 40220545 in words is "forty million, two hundred twenty thousand, five hundred forty-five".