42220881 has 12 divisors (see below), whose sum is σ = 61044880. Its totient is φ = 28119960.

The previous prime is 42220837. The next prime is 42220903. The reversal of 42220881 is 18802224.

It is not a de Polignac number, because 42220881 - 2¹¹ = 42218833 is a prime.

It is a super-2 number, since 2×42220881² = 3565205584832322, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (42220081) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 12726 + ... + 15696.

Almost surely, 2^42220881 is an apocalyptic number.

It is an amenable number.

42220881 is a deficient number, since it is larger than the sum of its proper divisors (18823999).

42220881 is a wasteful number, since it uses less digits than its factorization.

42220881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4556 (or 4553 counting only the distinct ones).

The product of its (nonzero) digits is 2048, while the sum is 27.

The square root of 42220881 is about 6497.7596908473. The cubic root of 42220881 is about 348.2109551307.

The spelling of 42220881 in words is "forty-two million, two hundred twenty thousand, eight hundred eighty-one".