1218345353 has 8 divisors (see below), whose sum is σ = 1276419840. Its totient is φ = 1161444240.

The previous prime is 1218345343. The next prime is 1218345371. The reversal of 1218345353 is 3535438121.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 1218345353 - 2¹⁰ = 1218344329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1218345313) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 291218 + ... + 295371.

It is an arithmetic number, because the mean of its divisors is an integer number (159552480).

Almost surely, 2^1218345353 is an apocalyptic number.

It is an amenable number.

1218345353 is a deficient number, since it is larger than the sum of its proper divisors (58074487).

1218345353 is an equidigital number, since it uses as much as digits as its factorization.

1218345353 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 586687.

The product of its digits is 43200, while the sum is 35.

The square root of 1218345353 is about 34904.8041535832. The cubic root of 1218345353 is about 1068.0464406879.

The spelling of 1218345353 in words is "one billion, two hundred eighteen million, three hundred forty-five thousand, three hundred fifty-three".