216553829 has 2 divisors, whose sum is σ = 216553830. Its totient is φ = 216553828.

The previous prime is 216553807. The next prime is 216553853. The reversal of 216553829 is 928355612.

216553829 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., 178089025 + 38464804 = 13345^2 + 6202^2 .

It is a cyclic number.

It is not a de Polignac number, because 216553829 - 2¹² = 216549733 is a prime.

It is a super-2 number, since 2×216553829² = 93791121709122482, which contains 22 as substring.

It is a Chen prime.

It is a congruent number.

It is a weakly prime.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108276914 + 108276915.

It is an arithmetic number, because the mean of its divisors is an integer number (108276915).

Almost surely, 2^216553829 is an apocalyptic number.

It is an amenable number.

216553829 is a deficient number, since it is larger than the sum of its proper divisors (1).

216553829 is an equidigital number, since it uses as much as digits as its factorization.

216553829 is an evil number, because the sum of its binary digits is even.

The product of its digits is 129600, while the sum is 41.

The square root of 216553829 is about 14715.7680397593. The cubic root of 216553829 is about 600.5123669719.

The spelling of 216553829 in words is "two hundred sixteen million, five hundred fifty-three thousand, eight hundred twenty-nine".