161517232 has 10 divisors (see below), whose sum is σ = 312939668. Its totient is φ = 80758608.

The previous prime is 161517229. The next prime is 161517241. The reversal of 161517232 is 232715161.

It is a happy number.

It is a self number, because there is not a number n which added to its sum of digits gives 161517232.

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 as a sum of consecutive naturals, namely, 5047398 + ... + 5047429.

Almost surely, 2^161517232 is an apocalyptic number.

It is an amenable number.

161517232 is a deficient number, since it is larger than the sum of its proper divisors (151422436).

161517232 is a wasteful number, since it uses less digits than its factorization.

161517232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10094835 (or 10094829 counting only the distinct ones).

The product of its digits is 2520, while the sum is 28.

The square root of 161517232 is about 12708.9429930266. The cubic root of 161517232 is about 544.5941281375.

The spelling of 161517232 in words is "one hundred sixty-one million, five hundred seventeen thousand, two hundred thirty-two".