216347051 has 2 divisors, whose sum is σ = 216347052. Its totient is φ = 216347050.

The previous prime is 216347023. The next prime is 216347069. The reversal of 216347051 is 150743612.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216347051 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (216347081) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108173525 + 108173526.

It is an arithmetic number, because the mean of its divisors is an integer number (108173526).

Almost surely, 2^216347051 is an apocalyptic number.

216347051 is a deficient number, since it is larger than the sum of its proper divisors (1).

216347051 is an equidigital number, since it uses as much as digits as its factorization.

216347051 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5040, while the sum is 29.

The square root of 216347051 is about 14708.7406326986. The cubic root of 216347051 is about 600.3211715692.

The spelling of 216347051 in words is "two hundred sixteen million, three hundred forty-seven thousand, fifty-one".