218563090451 has 2 divisors, whose sum is σ = 218563090452. Its totient is φ = 218563090450.

The previous prime is 218563090411. The next prime is 218563090453. The reversal of 218563090451 is 154090365812.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 218563090451 - 2¹⁰ = 218563089427 is a prime.

Together with 218563090453, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (218563090453) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109281545225 + 109281545226.

It is an arithmetic number, because the mean of its divisors is an integer number (109281545226).

Almost surely, 2^218563090451 is an apocalyptic number.

218563090451 is a deficient number, since it is larger than the sum of its proper divisors (1).

218563090451 is an equidigital number, since it uses as much as digits as its factorization.

218563090451 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 259200, while the sum is 44.

The spelling of 218563090451 in words is "two hundred eighteen billion, five hundred sixty-three million, ninety thousand, four hundred fifty-one".