161911532 has 12 divisors (see below), whose sum is σ = 285414360. Its totient is φ = 80364576.

The previous prime is 161911531. The next prime is 161911537. The reversal of 161911532 is 235119161.

161911532 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a junction number, because it is equal to n+sod(n) for n = 161911495 and 161911504.

It is not an unprimeable number, because it can be changed into a prime (161911531) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 147182 + ... + 148277.

It is an arithmetic number, because the mean of its divisors is an integer number (23784530).

Almost surely, 2^161911532 is an apocalyptic number.

It is an amenable number.

161911532 is a deficient number, since it is larger than the sum of its proper divisors (123502828).

161911532 is a wasteful number, since it uses less digits than its factorization.

161911532 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 295600 (or 295598 counting only the distinct ones).

The product of its digits is 1620, while the sum is 29.

The square root of 161911532 is about 12724.4462354949. The cubic root of 161911532 is about 545.0369270493.

The spelling of 161911532 in words is "one hundred sixty-one million, nine hundred eleven thousand, five hundred thirty-two".