161322417 has 12 divisors (see below), whose sum is σ = 233154064. Its totient is φ = 107487000.

The previous prime is 161322409. The next prime is 161322431. The reversal of 161322417 is 714223161.

161322417 is a `hidden beast` number, since 1 + 613 + 2 + 2 + 41 + 7 = 666.

It is not a de Polignac number, because 161322417 - 2³ = 161322409 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161322457) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 16278 + ... + 24240.

Almost surely, 2^161322417 is an apocalyptic number.

It is an amenable number.

161322417 is a deficient number, since it is larger than the sum of its proper divisors (71831647).

161322417 is a wasteful number, since it uses less digits than its factorization.

161322417 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10220 (or 10217 counting only the distinct ones).

The product of its digits is 2016, while the sum is 27.

The square root of 161322417 is about 12701.2761957214. The cubic root of 161322417 is about 544.3750848645.

Adding to 161322417 its reverse (714223161), we get a palindrome (875545578).

The spelling of 161322417 in words is "one hundred sixty-one million, three hundred twenty-two thousand, four hundred seventeen".