42225216 has 56 divisors (see below), whose sum is σ = 121883424. Its totient is φ = 12794880.

The previous prime is 42225173. The next prime is 42225257. The reversal of 42225216 is 61252224.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (24).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7885 + ... + 12108.

Almost surely, 2^42225216 is an apocalyptic number.

It is an amenable number.

42225216 is an abundant number, since it is smaller than the sum of its proper divisors (79658208).

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

42225216 is a wasteful number, since it uses less digits than its factorization.

42225216 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20019 (or 20009 counting only the distinct ones).

The product of its digits is 1920, while the sum is 24.

The square root of 42225216 is about 6498.0932587952. The cubic root of 42225216 is about 348.2228721632. Note that the first 3 decimals are identical.

The spelling of 42225216 in words is "forty-two million, two hundred twenty-five thousand, two hundred sixteen".