40220312173 has 2 divisors, whose sum is σ = 40220312174. Its totient is φ = 40220312172.

The previous prime is 40220312159. The next prime is 40220312233. The reversal of 40220312173 is 37121302204.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23976044964 + 16244267209 = 154842^2 + 127453^2 .

It is a cyclic number.

It is not a de Polignac number, because 40220312173 - 2⁹ = 40220311661 is a prime.

It is a super-2 number, since 2×40220312173² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40220312273) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20110156086 + 20110156087.

It is an arithmetic number, because the mean of its divisors is an integer number (20110156087).

Almost surely, 2^40220312173 is an apocalyptic number.

It is an amenable number.

40220312173 is a deficient number, since it is larger than the sum of its proper divisors (1).

40220312173 is an equidigital number, since it uses as much as digits as its factorization.

40220312173 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2016, while the sum is 25.

Adding to 40220312173 its reverse (37121302204), we get a palindrome (77341614377).

It can be divided in two parts, 4022031 and 2173, that added together give a palindrome (4024204).

The spelling of 40220312173 in words is "forty billion, two hundred twenty million, three hundred twelve thousand, one hundred seventy-three".