216710051 has 4 divisors (see below), whose sum is σ = 221995704. Its totient is φ = 211424400.

The previous prime is 216710023. The next prime is 216710099. The reversal of 216710051 is 150017612.

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 216710051 - 2²² = 212515747 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 216709999 and 216710026.

It is not an unprimeable number, because it can be changed into a prime (216710251) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2642765 + ... + 2642846.

It is an arithmetic number, because the mean of its divisors is an integer number (55498926).

Almost surely, 2^216710051 is an apocalyptic number.

216710051 is a deficient number, since it is larger than the sum of its proper divisors (5285653).

216710051 is an equidigital number, since it uses as much as digits as its factorization.

216710051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5285652.

The product of its (nonzero) digits is 420, while the sum is 23.

The square root of 216710051 is about 14721.0750626440. The cubic root of 216710051 is about 600.6567355314.

Adding to 216710051 its reverse (150017612), we get a palindrome (366727663).

The spelling of 216710051 in words is "two hundred sixteen million, seven hundred ten thousand, fifty-one".