211055216364431 has 2 divisors, whose sum is σ = 211055216364432. Its totient is φ = 211055216364430.

The previous prime is 211055216364407. The next prime is 211055216364497. The reversal of 211055216364431 is 134463612550112.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-211055216364431 is a prime.

It is a super-2 number, since 2×211055216364431² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (211055216360431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (29) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105527608182215 + 105527608182216.

It is an arithmetic number, because the mean of its divisors is an integer number (105527608182216).

Almost surely, 2^{211055216364431} is an apocalyptic number.

211055216364431 is a deficient number, since it is larger than the sum of its proper divisors (1).

211055216364431 is an equidigital number, since it uses as much as digits as its factorization.

211055216364431 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 518400, while the sum is 44.

The spelling of 211055216364431 in words is "two hundred eleven trillion, fifty-five billion, two hundred sixteen million, three hundred sixty-four thousand, four hundred thirty-one".