161120322 has 96 divisors (see below), whose sum is σ = 407182464. Its totient is φ = 45504000.

The previous prime is 161120303. The next prime is 161120329. The reversal of 161120322 is 223021161.

161120322 is a `hidden beast` number, since 1 + 611 + 20 + 32 + 2 = 666.

It is a super-2 number, since 2×161120322² = 51919516322767368, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a junction number, because it is equal to n+sod(n) for n = 161120295 and 161120304.

It is not an unprimeable number, because it can be changed into a prime (161120329) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 508108 + ... + 508424.

It is an arithmetic number, because the mean of its divisors is an integer number (4241484).

Almost surely, 2^161120322 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161120322, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (203591232).

161120322 is an abundant number, since it is smaller than the sum of its proper divisors (246062142).

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

161120322 is a wasteful number, since it uses less digits than its factorization.

161120322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 504 (or 501 counting only the distinct ones).

The product of its (nonzero) digits is 144, while the sum is 18.

The square root of 161120322 is about 12693.3180059431. The cubic root of 161120322 is about 544.1476697763.

Adding to 161120322 its reverse (223021161), we get a palindrome (384141483).

The spelling of 161120322 in words is "one hundred sixty-one million, one hundred twenty thousand, three hundred twenty-two".