218000051 has 2 divisors, whose sum is σ = 218000052. Its totient is φ = 218000050.

The previous prime is 218000011. The next prime is 218000087. The reversal of 218000051 is 150000812.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218000051 - 2⁶ = 217999987 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 217999993 and 218000029.

It is not a weakly prime, because it can be changed into another prime (218000011) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109000025 + 109000026.

It is an arithmetic number, because the mean of its divisors is an integer number (109000026).

Almost surely, 2^218000051 is an apocalyptic number.

218000051 is a deficient number, since it is larger than the sum of its proper divisors (1).

218000051 is an equidigital number, since it uses as much as digits as its factorization.

218000051 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 80, while the sum is 17.

The square root of 218000051 is about 14764.8247873112. The cubic root of 218000051 is about 601.8462124136.

Adding to 218000051 its reverse (150000812), we get a palindrome (368000863).

The spelling of 218000051 in words is "two hundred eighteen million, fifty-one", and thus it is an aban number.