216212565 has 8 divisors (see below), whose sum is σ = 345940128. Its totient is φ = 115313360.

The previous prime is 216212539. The next prime is 216212567. The reversal of 216212565 is 565212612.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 216212565 - 2⁶ = 216212501 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216212567) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 7207071 + ... + 7207100.

It is an arithmetic number, because the mean of its divisors is an integer number (43242516).

Almost surely, 2^216212565 is an apocalyptic number.

It is an amenable number.

216212565 is a deficient number, since it is larger than the sum of its proper divisors (129727563).

216212565 is a wasteful number, since it uses less digits than its factorization.

216212565 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14414179.

The product of its digits is 7200, while the sum is 30.

The square root of 216212565 is about 14704.1682865778. The cubic root of 216212565 is about 600.1967549166.

The spelling of 216212565 in words is "two hundred sixteen million, two hundred twelve thousand, five hundred sixty-five".