217272047 has 2 divisors, whose sum is σ = 217272048. Its totient is φ = 217272046.

The previous prime is 217271987. The next prime is 217272059. The reversal of 217272047 is 740272712.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 217272047 - 2¹⁶ = 217206511 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (217272067) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 108636023 + 108636024.

It is an arithmetic number, because the mean of its divisors is an integer number (108636024).

Almost surely, 2^217272047 is an apocalyptic number.

217272047 is a deficient number, since it is larger than the sum of its proper divisors (1).

217272047 is an equidigital number, since it uses as much as digits as its factorization.

217272047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10976, while the sum is 32.

The square root of 217272047 is about 14740.1508472607. The cubic root of 217272047 is about 601.1755167263.

The spelling of 217272047 in words is "two hundred seventeen million, two hundred seventy-two thousand, forty-seven".