161523112 has 16 divisors (see below), whose sum is σ = 316023840. Its totient is φ = 77250096.

The previous prime is 161523107. The next prime is 161523121. The reversal of 161523112 is 211325161.

It is a happy number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 438738 + ... + 439105.

It is an arithmetic number, because the mean of its divisors is an integer number (19751490).

Almost surely, 2^161523112 is an apocalyptic number.

It is an amenable number.

161523112 is a deficient number, since it is larger than the sum of its proper divisors (154500728).

161523112 is a wasteful number, since it uses less digits than its factorization.

161523112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 877872 (or 877868 counting only the distinct ones).

The product of its digits is 360, while the sum is 22.

The square root of 161523112 is about 12709.1743240857. The cubic root of 161523112 is about 544.6007366679.

Adding to 161523112 its reverse (211325161), we get a palindrome (372848273).

The spelling of 161523112 in words is "one hundred sixty-one million, five hundred twenty-three thousand, one hundred twelve".