216000131 has 2 divisors, whose sum is σ = 216000132. Its totient is φ = 216000130.

The previous prime is 216000119. The next prime is 216000139. The reversal of 216000131 is 131000612.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216000131 - 2¹⁸ = 215737987 is a prime.

It is a super-2 number, since 2×216000131² = 93312113184034322, which contains 22 as substring.

It is a Sophie Germain prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216000139) 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 as a sum of consecutive naturals, namely, 108000065 + 108000066.

It is an arithmetic number, because the mean of its divisors is an integer number (108000066).

Almost surely, 2^216000131 is an apocalyptic number.

216000131 is a deficient number, since it is larger than the sum of its proper divisors (1).

216000131 is an equidigital number, since it uses as much as digits as its factorization.

216000131 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 36, while the sum is 14.

The square root of 216000131 is about 14696.9429134089. The cubic root of 216000131 is about 600.0001212963. Note that the first 3 decimals are identical.

Adding to 216000131 its reverse (131000612), we get a palindrome (347000743).

The spelling of 216000131 in words is "two hundred sixteen million, one hundred thirty-one", and thus it is an aban number.