1161218330 has 16 divisors (see below), whose sum is σ = 2090646504. Its totient is φ = 464386560.

The previous prime is 1161218329. The next prime is 1161218347. The reversal of 1161218330 is 338121611.

It can be written as a sum of positive squares in 4 ways, for example, as 1160969329 + 249001 = 34073^2 + 499^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 1161218330.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 51170 + ... + 70290.

Almost surely, 2^1161218330 is an apocalyptic number.

1161218330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

1161218330 is a deficient number, since it is larger than the sum of its proper divisors (929428174).

1161218330 is a wasteful number, since it uses less digits than its factorization.

1161218330 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25201.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 1161218330 is about 34076.6537383001. The cubic root of 1161218330 is about 1051.0852965791.

Adding to 1161218330 its reverse (338121611), we get a palindrome (1499339941).

The spelling of 1161218330 in words is "one billion, one hundred sixty-one million, two hundred eighteen thousand, three hundred thirty".