40073221 has 2 divisors, whose sum is σ = 40073222. Its totient is φ = 40073220.

The previous prime is 40073207. The next prime is 40073249. The reversal of 40073221 is 12237004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23961025 + 16112196 = 4895^2 + 4014^2 .

It is a cyclic number.

It is not a de Polignac number, because 40073221 - 2¹³ = 40065029 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40073321) 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 as a sum of consecutive naturals, namely, 20036610 + 20036611.

It is an arithmetic number, because the mean of its divisors is an integer number (20036611).

Almost surely, 2^40073221 is an apocalyptic number.

It is an amenable number.

40073221 is a deficient number, since it is larger than the sum of its proper divisors (1).

40073221 is an equidigital number, since it uses as much as digits as its factorization.

40073221 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 336, while the sum is 19.

The square root of 40073221 is about 6330.3413020152. The cubic root of 40073221 is about 342.2037390499.

The spelling of 40073221 in words is "forty million, seventy-three thousand, two hundred twenty-one".