216625567 has 4 divisors (see below), whose sum is σ = 216957960. Its totient is φ = 216293176.

The previous prime is 216625559. The next prime is 216625573. The reversal of 216625567 is 765526612.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 216625567 - 2³ = 216625559 is a prime.

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216625667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 165217 + ... + 166522.

It is an arithmetic number, because the mean of its divisors is an integer number (54239490).

Almost surely, 2^216625567 is an apocalyptic number.

216625567 is a deficient number, since it is larger than the sum of its proper divisors (332393).

216625567 is an equidigital number, since it uses as much as digits as its factorization.

216625567 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 332392.

The product of its digits is 151200, while the sum is 40.

The square root of 216625567 is about 14718.2052914070. The cubic root of 216625567 is about 600.5786704252.

The spelling of 216625567 in words is "two hundred sixteen million, six hundred twenty-five thousand, five hundred sixty-seven".