161322832 has 40 divisors (see below), whose sum is σ = 343629792. Its totient is φ = 72758400.

The previous prime is 161322829. The next prime is 161322839. The reversal of 161322832 is 238223161.

161322832 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×161322832² = 52050112249000448, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 161322832.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161322839) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 19558 + ... + 26554.

Almost surely, 2^161322832 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161322832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (171814896).

161322832 is an abundant number, since it is smaller than the sum of its proper divisors (182306960).

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

161322832 is a wasteful number, since it uses less digits than its factorization.

161322832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7147 (or 7141 counting only the distinct ones).

The product of its digits is 3456, while the sum is 28.

The square root of 161322832 is about 12701.2925326519. The cubic root of 161322832 is about 544.3755516635.

Adding to 161322832 its reverse (238223161), we get a palindrome (399545993).

The spelling of 161322832 in words is "one hundred sixty-one million, three hundred twenty-two thousand, eight hundred thirty-two".