216369253 has 2 divisors, whose sum is σ = 216369254. Its totient is φ = 216369252.

The previous prime is 216369233. The next prime is 216369271. The reversal of 216369253 is 352963612.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 209728324 + 6640929 = 14482^2 + 2577^2 .

It is a cyclic number.

It is not a de Polignac number, because 216369253 - 2⁵ = 216369221 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216369233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108184626 + 108184627.

It is an arithmetic number, because the mean of its divisors is an integer number (108184627).

Almost surely, 2^216369253 is an apocalyptic number.

It is an amenable number.

216369253 is a deficient number, since it is larger than the sum of its proper divisors (1).

216369253 is an equidigital number, since it uses as much as digits as its factorization.

216369253 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 58320, while the sum is 37.

The square root of 216369253 is about 14709.4953346469. The cubic root of 216369253 is about 600.3417062837.

The spelling of 216369253 in words is "two hundred sixteen million, three hundred sixty-nine thousand, two hundred fifty-three".