75312216 has 72 divisors (see below), whose sum is σ = 237283020. Its totient is φ = 21516768.

The previous prime is 75312191. The next prime is 75312233. The reversal of 75312216 is 61221357.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (72).

It is a self number, because there is not a number n which added to its sum of digits gives 75312216.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 7146 + ... + 14201.

Almost surely, 2^75312216 is an apocalyptic number.

It is an amenable number.

75312216 is an abundant number, since it is smaller than the sum of its proper divisors (161970804).

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

75312216 is a wasteful number, since it uses less digits than its factorization.

75312216 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21373 (or 21359 counting only the distinct ones).

The product of its digits is 2520, while the sum is 27.

The square root of 75312216 is about 8678.2611161453. The cubic root of 75312216 is about 422.3007073345.

The spelling of 75312216 in words is "seventy-five million, three hundred twelve thousand, two hundred sixteen".