1159553218 has 4 divisors (see below), whose sum is σ = 1739329830. Its totient is φ = 579776608.

The previous prime is 1159553201. The next prime is 1159553273. The reversal of 1159553218 is 8123559511.

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: 8123559511 = 229 ⋅35474059.

It can be written as a sum of positive squares in only one way, i.e., 826965049 + 332588169 = 28757^2 + 18237^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 289888303 + ... + 289888306.

Almost surely, 2^1159553218 is an apocalyptic number.

1159553218 is a deficient number, since it is larger than the sum of its proper divisors (579776612).

1159553218 is an equidigital number, since it uses as much as digits as its factorization.

1159553218 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 579776611.

The product of its digits is 54000, while the sum is 40.

The square root of 1159553218 is about 34052.2131145686. The cubic root of 1159553218 is about 1050.5826601360.

The spelling of 1159553218 in words is "one billion, one hundred fifty-nine million, five hundred fifty-three thousand, two hundred eighteen".