1218132355 has 8 divisors (see below), whose sum is σ = 1594646064. Its totient is φ = 885914400.

The previous prime is 1218132343. The next prime is 1218132359. The reversal of 1218132355 is 5532318121.

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

It is not a de Polignac number, because 1218132355 - 2⁹ = 1218131843 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1218132359) 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, 11073876 + ... + 11073985.

It is an arithmetic number, because the mean of its divisors is an integer number (199330758).

Almost surely, 2^1218132355 is an apocalyptic number.

1218132355 is a deficient number, since it is larger than the sum of its proper divisors (376513709).

1218132355 is a wasteful number, since it uses less digits than its factorization.

1218132355 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22147877.

The product of its digits is 7200, while the sum is 31.

The square root of 1218132355 is about 34901.7528929422. The cubic root of 1218132355 is about 1067.9841964281.

The spelling of 1218132355 in words is "one billion, two hundred eighteen million, one hundred thirty-two thousand, three hundred fifty-five".