216551207 has 8 divisors (see below), whose sum is σ = 227175840. Its totient is φ = 206137120.

The previous prime is 216551197. The next prime is 216551221. The reversal of 216551207 is 702155612.

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

It is a cyclic number.

It is not a de Polignac number, because 216551207 - 2⁴ = 216551191 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (29).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 216551207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216554207) 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, 50528 + ... + 54645.

It is an arithmetic number, because the mean of its divisors is an integer number (28396980).

Almost surely, 2^216551207 is an apocalyptic number.

216551207 is a deficient number, since it is larger than the sum of its proper divisors (10624633).

216551207 is a wasteful number, since it uses less digits than its factorization.

216551207 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 105273.

The product of its (nonzero) digits is 4200, while the sum is 29.

The square root of 216551207 is about 14715.6789513770. The cubic root of 216551207 is about 600.5099433254.

The spelling of 216551207 in words is "two hundred sixteen million, five hundred fifty-one thousand, two hundred seven".