216772220471 has 2 divisors, whose sum is σ = 216772220472. Its totient is φ = 216772220470.

The previous prime is 216772220393. The next prime is 216772220477. The reversal of 216772220471 is 174022277612.

216772220471 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-216772220471 is a prime.

It is a super-3 number, since 3×216772220471³ (a number of 35 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (216772220477) 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, 108386110235 + 108386110236.

It is an arithmetic number, because the mean of its divisors is an integer number (108386110236).

Almost surely, 2^216772220471 is an apocalyptic number.

216772220471 is a deficient number, since it is larger than the sum of its proper divisors (1).

216772220471 is an equidigital number, since it uses as much as digits as its factorization.

216772220471 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 131712, while the sum is 41.

The spelling of 216772220471 in words is "two hundred sixteen billion, seven hundred seventy-two million, two hundred twenty thousand, four hundred seventy-one".