1218455313 has 8 divisors (see below), whose sum is σ = 1710112800. Its totient is φ = 769550688.

The previous prime is 1218455299. The next prime is 1218455317. The reversal of 1218455313 is 3135548121.

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

It is not a de Polignac number, because 1218455313 - 2⁸ = 1218455057 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218455317) 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, 10688148 + ... + 10688261.

It is an arithmetic number, because the mean of its divisors is an integer number (213764100).

Almost surely, 2^1218455313 is an apocalyptic number.

It is an amenable number.

1218455313 is a deficient number, since it is larger than the sum of its proper divisors (491657487).

1218455313 is a wasteful number, since it uses less digits than its factorization.

1218455313 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21376431.

The product of its digits is 14400, while the sum is 33.

The square root of 1218455313 is about 34906.3792593847. The cubic root of 1218455313 is about 1068.0785713842.

The spelling of 1218455313 in words is "one billion, two hundred eighteen million, four hundred fifty-five thousand, three hundred thirteen".