218028953 has 2 divisors, whose sum is σ = 218028954. Its totient is φ = 218028952.

The previous prime is 218028949. The next prime is 218028973. The reversal of 218028953 is 359820812.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 147938569 + 70090384 = 12163^2 + 8372^2 .

It is a cyclic number.

It is not a de Polignac number, because 218028953 - 2² = 218028949 is a prime.

It is not a weakly prime, because it can be changed into another prime (218028973) 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, 109014476 + 109014477.

It is an arithmetic number, because the mean of its divisors is an integer number (109014477).

Almost surely, 2^218028953 is an apocalyptic number.

It is an amenable number.

218028953 is a deficient number, since it is larger than the sum of its proper divisors (1).

218028953 is an equidigital number, since it uses as much as digits as its factorization.

218028953 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 34560, while the sum is 38.

The square root of 218028953 is about 14765.8034999793. The cubic root of 218028953 is about 601.8728084174.

The spelling of 218028953 in words is "two hundred eighteen million, twenty-eight thousand, nine hundred fifty-three".