161841322 has 8 divisors (see below), whose sum is σ = 243450756. Its totient is φ = 80691072.

The previous prime is 161841287. The next prime is 161841341. The reversal of 161841322 is 223148161.

It can be written as a sum of positive squares in 2 ways, for example, as 157477401 + 4363921 = 12549^2 + 2089^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×161841322² = 52385227013415368, which contains 22 as substring.

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 in 3 ways as a sum of consecutive naturals, for example, 113913 + ... + 115324.

Almost surely, 2^161841322 is an apocalyptic number.

161841322 is a deficient number, since it is larger than the sum of its proper divisors (81609434).

161841322 is a wasteful number, since it uses less digits than its factorization.

161841322 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 229592.

The product of its digits is 2304, while the sum is 28.

The square root of 161841322 is about 12721.6870736550. The cubic root of 161841322 is about 544.9581338656.

Adding to 161841322 its reverse (223148161), we get a palindrome (384989483).

The spelling of 161841322 in words is "one hundred sixty-one million, eight hundred forty-one thousand, three hundred twenty-two".