42221959809 has 16 divisors (see below), whose sum is σ = 61835366400. Its totient is φ = 25507087056.

The previous prime is 42221959757. The next prime is 42221959811. The reversal of 42221959809 is 90895912224.

It is not a de Polignac number, because 42221959809 - 2³¹ = 40074476161 is a prime.

It is a super-2 number, since 2×42221959809² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (42221959609) 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, 16101649 + ... + 16104270.

It is an arithmetic number, because the mean of its divisors is an integer number (3864710400).

Almost surely, 2^42221959809 is an apocalyptic number.

It is an amenable number.

42221959809 is a deficient number, since it is larger than the sum of its proper divisors (19613406591).

42221959809 is a wasteful number, since it uses less digits than its factorization.

42221959809 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32205964.

The product of its (nonzero) digits is 933120, while the sum is 51.

The spelling of 42221959809 in words is "forty-two billion, two hundred twenty-one million, nine hundred fifty-nine thousand, eight hundred nine".