161118522 has 12 divisors (see below), whose sum is σ = 349090170. Its totient is φ = 53706168.

The previous prime is 161118511. The next prime is 161118527. The reversal of 161118522 is 225811161.

It can be written as a sum of positive squares in only one way, i.e., 91412721 + 69705801 = 9561^2 + 8349^2 .

It is not an unprimeable number, because it can be changed into a prime (161118527) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4475497 + ... + 4475532.

Almost surely, 2^161118522 is an apocalyptic number.

161118522 is an abundant number, since it is smaller than the sum of its proper divisors (187971648).

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

161118522 is a wasteful number, since it uses less digits than its factorization.

161118522 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8951037 (or 8951034 counting only the distinct ones).

The product of its digits is 960, while the sum is 27.

The square root of 161118522 is about 12693.2471022981. The cubic root of 161118522 is about 544.1456434037.

Adding to 161118522 its reverse (225811161), we get a palindrome (386929683).

The spelling of 161118522 in words is "one hundred sixty-one million, one hundred eighteen thousand, five hundred twenty-two".