216625229 has 2 divisors, whose sum is σ = 216625230. Its totient is φ = 216625228.

The previous prime is 216625223. The next prime is 216625249. The reversal of 216625229 is 922526612.

216625229 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., 169702729 + 46922500 = 13027^2 + 6850^2 .

It is a cyclic number.

It is not a de Polignac number, because 216625229 - 2²⁰ = 215576653 is a prime.

It is a Chen prime.

It is equal to p_11946941 and since 216625229 and 11946941 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216625223) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108312614 + 108312615.

It is an arithmetic number, because the mean of its divisors is an integer number (108312615).

Almost surely, 2^216625229 is an apocalyptic number.

It is an amenable number.

216625229 is a deficient number, since it is larger than the sum of its proper divisors (1).

216625229 is an equidigital number, since it uses as much as digits as its factorization.

216625229 is an evil number, because the sum of its binary digits is even.

The product of its digits is 25920, while the sum is 35.

The square root of 216625229 is about 14718.1938090243. The cubic root of 216625229 is about 600.5783580649.

The spelling of 216625229 in words is "two hundred sixteen million, six hundred twenty-five thousand, two hundred twenty-nine".