42281216 has 18 divisors (see below), whose sum is σ = 84397782. Its totient is φ = 21140480.

The previous prime is 42281207. The next prime is 42281231. The reversal of 42281216 is 61218224.

It is a happy number.

It can be written as a sum of positive squares in only one way, i.e., 27040000 + 15241216 = 5200^2 + 3904^2 .

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 as a sum of consecutive naturals, namely, 82325 + ... + 82836.

Almost surely, 2^42281216 is an apocalyptic number.

It is an amenable number.

42281216 is a deficient number, since it is larger than the sum of its proper divisors (42116566).

42281216 is an equidigital number, since it uses as much as digits as its factorization.

42281216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 165177 (or 165163 counting only the distinct ones).

The product of its digits is 1536, while the sum is 26.

The square root of 42281216 is about 6502.4007874015. The cubic root of 42281216 is about 348.3767444097.

The spelling of 42281216 in words is "forty-two million, two hundred eighty-one thousand, two hundred sixteen".