1161522318 has 48 divisors (see below), whose sum is σ = 2591648640. Its totient is φ = 346708560.

The previous prime is 1161522293. The next prime is 1161522319. The reversal of 1161522318 is 8132251611.

1161522318 is digitally balanced in base 4, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1161522319) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 36703 + ... + 60581.

It is an arithmetic number, because the mean of its divisors is an integer number (53992680).

Almost surely, 2^1161522318 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1161522318, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1295824320).

1161522318 is an abundant number, since it is smaller than the sum of its proper divisors (1430126322).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1161522318 is a wasteful number, since it uses less digits than its factorization.

1161522318 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 23973 (or 23962 counting only the distinct ones).

The product of its digits is 2880, while the sum is 30.

The square root of 1161522318 is about 34081.1138022219. The cubic root of 1161522318 is about 1051.1770075667.

Adding to 1161522318 its reverse (8132251611), we get a palindrome (9293773929).

It can be divided in two parts, 11615 and 22318, that added together give a palindrome (33933).

The spelling of 1161522318 in words is "one billion, one hundred sixty-one million, five hundred twenty-two thousand, three hundred eighteen".