215331728011 has 2 divisors, whose sum is σ = 215331728012. Its totient is φ = 215331728010.

The previous prime is 215331727997. The next prime is 215331728041. The reversal of 215331728011 is 110827133512.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 215331728011 - 2¹³ = 215331719819 is a prime.

It is a super-2 number, since 2×215331728011² (a number of 23 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (215331728041) 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, 107665864005 + 107665864006.

It is an arithmetic number, because the mean of its divisors is an integer number (107665864006).

Almost surely, 2^215331728011 is an apocalyptic number.

215331728011 is a deficient number, since it is larger than the sum of its proper divisors (1).

215331728011 is an equidigital number, since it uses as much as digits as its factorization.

215331728011 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10080, while the sum is 34.

The spelling of 215331728011 in words is "two hundred fifteen billion, three hundred thirty-one million, seven hundred twenty-eight thousand, eleven".