216034421 has 2 divisors, whose sum is σ = 216034422. Its totient is φ = 216034420.

The previous prime is 216034409. The next prime is 216034433. The reversal of 216034421 is 124430612.

216034421 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a balanced prime because it is at equal distance from previous prime (216034409) and next prime (216034433).

It can be written as a sum of positive squares in only one way, i.e., 215062225 + 972196 = 14665^2 + 986^2 .

It is a cyclic number.

It is not a de Polignac number, because 216034421 - 2²² = 211840117 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216033421) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108017210 + 108017211.

It is an arithmetic number, because the mean of its divisors is an integer number (108017211).

Almost surely, 2^216034421 is an apocalyptic number.

It is an amenable number.

216034421 is a deficient number, since it is larger than the sum of its proper divisors (1).

216034421 is an equidigital number, since it uses as much as digits as its factorization.

216034421 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1152, while the sum is 23.

The square root of 216034421 is about 14698.1094362506. The cubic root of 216034421 is about 600.0318696035.

The spelling of 216034421 in words is "two hundred sixteen million, thirty-four thousand, four hundred twenty-one".