320218227155 has 4 divisors (see below), whose sum is σ = 384261872592. Its totient is φ = 256174581720.

The previous prime is 320218227047. The next prime is 320218227193. The reversal of 320218227155 is 551722812023.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 551722812023 = 306919 ⋅1797617.

It is not a de Polignac number, because 320218227155 - 2³² = 315923259859 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 32021822711 + ... + 32021822720.

It is an arithmetic number, because the mean of its divisors is an integer number (96065468148).

Almost surely, 2^320218227155 is an apocalyptic number.

320218227155 is a deficient number, since it is larger than the sum of its proper divisors (64043645437).

320218227155 is an equidigital number, since it uses as much as digits as its factorization.

320218227155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64043645436.

The product of its (nonzero) digits is 67200, while the sum is 38.

The spelling of 320218227155 in words is "three hundred twenty billion, two hundred eighteen million, two hundred twenty-seven thousand, one hundred fifty-five".