42221147 has 2 divisors, whose sum is σ = 42221148. Its totient is φ = 42221146.

The previous prime is 42221143. The next prime is 42221197. The reversal of 42221147 is 74112224.

42221147 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 42221147 - 2² = 42221143 is a prime.

It is equal to p_2560244 and since 42221147 and 2560244 have the same sum of digits, it is a Honaker prime.

It is not a weakly prime, because it can be changed into another prime (42221143) 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, 21110573 + 21110574.

It is an arithmetic number, because the mean of its divisors is an integer number (21110574).

Almost surely, 2^42221147 is an apocalyptic number.

42221147 is a deficient number, since it is larger than the sum of its proper divisors (1).

42221147 is an equidigital number, since it uses as much as digits as its factorization.

42221147 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 896, while the sum is 23.

The square root of 42221147 is about 6497.7801594083. The cubic root of 42221147 is about 348.2116863954.

The spelling of 42221147 in words is "forty-two million, two hundred twenty-one thousand, one hundred forty-seven".