161322132 has 24 divisors (see below), whose sum is σ = 378000000. Its totient is φ = 53548096.

The previous prime is 161322113. The next prime is 161322173. The reversal of 161322132 is 231223161.

It is a nude number because it is divisible by every one of its digits.

It is a junction number, because it is equal to n+sod(n) for n = 161322099 and 161322108.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 25257 + ... + 30992.

It is an arithmetic number, because the mean of its divisors is an integer number (15750000).

Almost surely, 2^161322132 is an apocalyptic number.

161322132 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

161322132 is an abundant number, since it is smaller than the sum of its proper divisors (216677868).

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

161322132 is a wasteful number, since it uses less digits than its factorization.

161322132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 56495 (or 56493 counting only the distinct ones).

The product of its digits is 432, while the sum is 21.

The square root of 161322132 is about 12701.2649763714. The cubic root of 161322132 is about 544.3747642911.

Adding to 161322132 its reverse (231223161), we get a palindrome (392545293).

The spelling of 161322132 in words is "one hundred sixty-one million, three hundred twenty-two thousand, one hundred thirty-two".