216597151 has 4 divisors (see below), whose sum is σ = 217080000. Its totient is φ = 216114304.

The previous prime is 216597133. The next prime is 216597191. The reversal of 216597151 is 151795612.

216597151 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 216597151 - 2¹¹ = 216595103 is a prime.

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 216597151.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216597191) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 240751 + ... + 241648.

It is an arithmetic number, because the mean of its divisors is an integer number (54270000).

Almost surely, 2^216597151 is an apocalyptic number.

216597151 is a deficient number, since it is larger than the sum of its proper divisors (482849).

216597151 is an equidigital number, since it uses as much as digits as its factorization.

216597151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 482848.

The product of its digits is 18900, while the sum is 37.

The square root of 216597151 is about 14717.2399246598. The cubic root of 216597151 is about 600.5524088440.

It can be divided in two parts, 21659715 and 1, that added together give a square (21659716 = 4654²).

The spelling of 216597151 in words is "two hundred sixteen million, five hundred ninety-seven thousand, one hundred fifty-one".