216225078 has 16 divisors (see below), whose sum is σ = 433344000. Its totient is φ = 71926056.

The previous prime is 216225071. The next prime is 216225083. The reversal of 216225078 is 870522612.

It is a super-2 number, since 2×216225078² = 93506568712212168, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216225071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 34078 + ... + 39921.

It is an arithmetic number, because the mean of its divisors is an integer number (27084000).

Almost surely, 2^216225078 is an apocalyptic number.

216225078 is an abundant number, since it is smaller than the sum of its proper divisors (217118922).

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

216225078 is a wasteful number, since it uses less digits than its factorization.

216225078 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 74491.

The product of its (nonzero) digits is 13440, while the sum is 33.

The square root of 216225078 is about 14704.5937720156. The cubic root of 216225078 is about 600.2083332093.

The spelling of 216225078 in words is "two hundred sixteen million, two hundred twenty-five thousand, seventy-eight".