216151 has 6 divisors (see below), whose sum is σ = 234240. Its totient is φ = 199368.

The previous prime is 216149. The next prime is 216157. The reversal of 216151 is 151612.

It is a happy number.

It is not a de Polignac number, because 216151 - 2¹ = 216149 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 13.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (216157) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 471 + ... + 808.

It is an arithmetic number, because the mean of its divisors is an integer number (39040).

2²¹⁶¹⁵¹ is an apocalyptic number.

216151 is a deficient number, since it is larger than the sum of its proper divisors (18089).

216151 is a wasteful number, since it uses less digits than its factorization.

216151 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1305 (or 1292 counting only the distinct ones).

The product of its digits is 60, while the sum is 16.

The square root of 216151 is about 464.9204232984. The cubic root of 216151 is about 60.0139782247.

Adding to 216151 its reverse (151612), we get a palindrome (367763).

The spelling of 216151 in words is "two hundred sixteen thousand, one hundred fifty-one".