42215556 has 24 divisors (see below), whose sum is σ = 104297760. Its totient is φ = 13244032.

The previous prime is 42215531. The next prime is 42215581. The reversal of 42215556 is 65551224.

It is an interprime number because it is at equal distance from previous prime (42215531) and next prime (42215581).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (7) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 103266 + ... + 103673.

It is an arithmetic number, because the mean of its divisors is an integer number (4345740).

Almost surely, 2^42215556 is an apocalyptic number.

It is an amenable number.

42215556 is an abundant number, since it is smaller than the sum of its proper divisors (62082204).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

42215556 is a wasteful number, since it uses less digits than its factorization.

42215556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206963 (or 206961 counting only the distinct ones).

The product of its digits is 12000, while the sum is 30.

The square root of 42215556 is about 6497.3499213141. The cubic root of 42215556 is about 348.1963154449.

The spelling of 42215556 in words is "forty-two million, two hundred fifteen thousand, five hundred fifty-six".