218057479 has 2 divisors, whose sum is σ = 218057480. Its totient is φ = 218057478.

The previous prime is 218057473. The next prime is 218057513. The reversal of 218057479 is 974750812.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 218057479 - 2¹³ = 218049287 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (218057473) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 109028739 + 109028740.

It is an arithmetic number, because the mean of its divisors is an integer number (109028740).

Almost surely, 2^218057479 is an apocalyptic number.

218057479 is a deficient number, since it is larger than the sum of its proper divisors (1).

218057479 is an equidigital number, since it uses as much as digits as its factorization.

218057479 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 141120, while the sum is 43.

The square root of 218057479 is about 14766.7694164973. The cubic root of 218057479 is about 601.8990561165.

The spelling of 218057479 in words is "two hundred eighteen million, fifty-seven thousand, four hundred seventy-nine".