42217277 has 2 divisors, whose sum is σ = 42217278. Its totient is φ = 42217276.

The previous prime is 42217237. The next prime is 42217283. The reversal of 42217277 is 77271224.

It is a happy number.

42217277 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 41229241 + 988036 = 6421^2 + 994^2 .

It is a cyclic number.

It is not a de Polignac number, because 42217277 - 2¹² = 42213181 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (42217237) by changing a digit.

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 as a sum of consecutive naturals, namely, 21108638 + 21108639.

It is an arithmetic number, because the mean of its divisors is an integer number (21108639).

Almost surely, 2^42217277 is an apocalyptic number.

It is an amenable number.

42217277 is a deficient number, since it is larger than the sum of its proper divisors (1).

42217277 is an equidigital number, since it uses as much as digits as its factorization.

42217277 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10976, while the sum is 32.

The square root of 42217277 is about 6497.4823585755. The cubic root of 42217277 is about 348.2010470161.

The spelling of 42217277 in words is "forty-two million, two hundred seventeen thousand, two hundred seventy-seven".