55218504233 has 2 divisors, whose sum is σ = 55218504234. Its totient is φ = 55218504232.

The previous prime is 55218504227. The next prime is 55218504251. The reversal of 55218504233 is 33240581255.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 52167930409 + 3050573824 = 228403^2 + 55232^2 .

It is a cyclic number.

It is not a de Polignac number, because 55218504233 - 2⁴ = 55218504217 is a prime.

It is not a weakly prime, because it can be changed into another prime (55218504283) 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, 27609252116 + 27609252117.

It is an arithmetic number, because the mean of its divisors is an integer number (27609252117).

Almost surely, 2^55218504233 is an apocalyptic number.

It is an amenable number.

55218504233 is a deficient number, since it is larger than the sum of its proper divisors (1).

55218504233 is an equidigital number, since it uses as much as digits as its factorization.

55218504233 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 144000, while the sum is 38.

The spelling of 55218504233 in words is "fifty-five billion, two hundred eighteen million, five hundred four thousand, two hundred thirty-three".