40221506 has 8 divisors (see below), whose sum is σ = 64973244. Its totient is φ = 18563760.

The previous prime is 40221487. The next prime is 40221523. The reversal of 40221506 is 60512204.

It is a happy number.

40221506 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 40208281 + 13225 = 6341^2 + 115^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

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, 773465 + ... + 773516.

Almost surely, 2^40221506 is an apocalyptic number.

40221506 is a deficient number, since it is larger than the sum of its proper divisors (24751738).

40221506 is a wasteful number, since it uses less digits than its factorization.

40221506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1546996.

The product of its (nonzero) digits is 480, while the sum is 20.

The square root of 40221506 is about 6342.0427308557. The cubic root of 40221506 is about 342.6253108520.

The spelling of 40221506 in words is "forty million, two hundred twenty-one thousand, five hundred six".