42291000173 has 2 divisors, whose sum is σ = 42291000174. Its totient is φ = 42291000172.

The previous prime is 42291000131. The next prime is 42291000187. The reversal of 42291000173 is 37100019224.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 42206415364 + 84584809 = 205442^2 + 9197^2 .

It is a cyclic number.

It is not a de Polignac number, because 42291000173 - 2⁸ = 42290999917 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42291008173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21145500086 + 21145500087.

It is an arithmetic number, because the mean of its divisors is an integer number (21145500087).

Almost surely, 2^42291000173 is an apocalyptic number.

It is an amenable number.

42291000173 is a deficient number, since it is larger than the sum of its proper divisors (1).

42291000173 is an equidigital number, since it uses as much as digits as its factorization.

42291000173 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 29.

Adding to 42291000173 its reverse (37100019224), we get a palindrome (79391019397).

The spelling of 42291000173 in words is "forty-two billion, two hundred ninety-one million, one hundred seventy-three", and thus it is an aban number.