42221971 has 16 divisors (see below), whose sum is σ = 48729600. Its totient is φ = 36180000.

The previous prime is 42221957. The next prime is 42221987. The reversal of 42221971 is 17912224.

It is a cyclic number.

It is not a de Polignac number, because 42221971 - 2¹³ = 42213779 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42221911) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 55846 + ... + 56596.

It is an arithmetic number, because the mean of its divisors is an integer number (3045600).

Almost surely, 2^42221971 is an apocalyptic number.

42221971 is a deficient number, since it is larger than the sum of its proper divisors (6507629).

42221971 is a wasteful number, since it uses less digits than its factorization.

42221971 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1050.

The product of its digits is 2016, while the sum is 28.

The square root of 42221971 is about 6497.8435653684. The cubic root of 42221971 is about 348.2139516470.

The spelling of 42221971 in words is "forty-two million, two hundred twenty-one thousand, nine hundred seventy-one".