216600051 has 8 divisors (see below), whose sum is σ = 288877264. Its totient is φ = 144361440.

The previous prime is 216600047. The next prime is 216600061. The reversal of 216600051 is 150006612.

It is a happy number.

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

It is not a de Polignac number, because 216600051 - 2² = 216600047 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (216600001) 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, 8121 + ... + 22341.

It is an arithmetic number, because the mean of its divisors is an integer number (36109658).

Almost surely, 2^216600051 is an apocalyptic number.

216600051 is a deficient number, since it is larger than the sum of its proper divisors (72277213).

216600051 is a wasteful number, since it uses less digits than its factorization.

216600051 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19301.

The product of its (nonzero) digits is 360, while the sum is 21.

The square root of 216600051 is about 14717.3384482385. The cubic root of 216600051 is about 600.5550890796. Note that the first 3 decimals are identical.

Adding to 216600051 its reverse (150006612), we get a palindrome (366606663).

The spelling of 216600051 in words is "two hundred sixteen million, six hundred thousand, fifty-one".