216253747 has 2 divisors, whose sum is σ = 216253748. Its totient is φ = 216253746.

The previous prime is 216253733. The next prime is 216253757. The reversal of 216253747 is 747352612.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 216253747 - 2⁷ = 216253619 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (216253757) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108126873 + 108126874.

It is an arithmetic number, because the mean of its divisors is an integer number (108126874).

Almost surely, 2^216253747 is an apocalyptic number.

216253747 is a deficient number, since it is larger than the sum of its proper divisors (1).

216253747 is an equidigital number, since it uses as much as digits as its factorization.

216253747 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 70560, while the sum is 37.

The square root of 216253747 is about 14705.5685711230. The cubic root of 216253747 is about 600.2348589827.

The spelling of 216253747 in words is "two hundred sixteen million, two hundred fifty-three thousand, seven hundred forty-seven".