42221998 has 32 divisors (see below), whose sum is σ = 78676416. Its totient is φ = 16547328.

The previous prime is 42221989. The next prime is 42222023. The reversal of 42221998 is 89912224.

It is a super-2 number, since 2×42221998² = 3565394230224008, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 19540 + ... + 21592.

It is an arithmetic number, because the mean of its divisors is an integer number (2458638).

Almost surely, 2^42221998 is an apocalyptic number.

42221998 is a deficient number, since it is larger than the sum of its proper divisors (36454418).

42221998 is a wasteful number, since it uses less digits than its factorization.

42221998 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2188.

The product of its digits is 20736, while the sum is 37.

The square root of 42221998 is about 6497.8456429804. The cubic root of 42221998 is about 348.2140258720.

The spelling of 42221998 in words is "forty-two million, two hundred twenty-one thousand, nine hundred ninety-eight".