40221210173 has 2 divisors, whose sum is σ = 40221210174. Its totient is φ = 40221210172.

The previous prime is 40221210151. The next prime is 40221210179. The reversal of 40221210173 is 37101212204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 40207468324 + 13741849 = 200518^2 + 3707^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40221210173 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40221210179) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110605086 + 20110605087.

It is an arithmetic number, because the mean of its divisors is an integer number (20110605087).

Almost surely, 2^40221210173 is an apocalyptic number.

It is an amenable number.

40221210173 is a deficient number, since it is larger than the sum of its proper divisors (1).

40221210173 is an equidigital number, since it uses as much as digits as its factorization.

40221210173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 672, while the sum is 23.

Adding to 40221210173 its reverse (37101212204), we get a palindrome (77322422377).

The spelling of 40221210173 in words is "forty billion, two hundred twenty-one million, two hundred ten thousand, one hundred seventy-three".