216106481 has 2 divisors, whose sum is σ = 216106482. Its totient is φ = 216106480.

The previous prime is 216106477. The next prime is 216106523. The reversal of 216106481 is 184601612.

216106481 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 152744881 + 63361600 = 12359^2 + 7960^2 .

It is a cyclic number.

It is not a de Polignac number, because 216106481 - 2² = 216106477 is a prime.

It is a super-2 number, since 2×216106481² = 93404022260406722, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216106181) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108053240 + 108053241.

It is an arithmetic number, because the mean of its divisors is an integer number (108053241).

Almost surely, 2^216106481 is an apocalyptic number.

It is an amenable number.

216106481 is a deficient number, since it is larger than the sum of its proper divisors (1).

216106481 is an equidigital number, since it uses as much as digits as its factorization.

216106481 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2304, while the sum is 29.

The square root of 216106481 is about 14700.5605675430. The cubic root of 216106481 is about 600.0985773218.

The spelling of 216106481 in words is "two hundred sixteen million, one hundred six thousand, four hundred eighty-one".