211550031643451 has 2 divisors, whose sum is σ = 211550031643452. Its totient is φ = 211550031643450.

The previous prime is 211550031643367. The next prime is 211550031643453. The reversal of 211550031643451 is 154346130055112.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 211550031643451 - 2⁴² = 207151985132347 is a prime.

It is a Sophie Germain prime.

Together with 211550031643453, it forms a pair of twin primes.

It is a Chen prime.

It is a junction number, because it is equal to n+sod(n) for n = 211550031643399 and 211550031643408.

It is not a weakly prime, because it can be changed into another prime (211550031643453) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 105775015821725 + 105775015821726.

It is an arithmetic number, because the mean of its divisors is an integer number (105775015821726).

Almost surely, 2^{211550031643451} is an apocalyptic number.

211550031643451 is a deficient number, since it is larger than the sum of its proper divisors (1).

211550031643451 is an equidigital number, since it uses as much as digits as its factorization.

211550031643451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 216000, while the sum is 41.

Adding to 211550031643451 its reverse (154346130055112), we get a palindrome (365896161698563).

The spelling of 211550031643451 in words is "two hundred eleven trillion, five hundred fifty billion, thirty-one million, six hundred forty-three thousand, four hundred fifty-one".