161603422 has 8 divisors (see below), whose sum is σ = 242461872. Its totient is φ = 80782800.

The previous prime is 161603389. The next prime is 161603443. The reversal of 161603422 is 224306161.

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

It is a super-2 number, since 2×161603422² = 52231332004220168, which contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6847 + ... + 19237.

It is an arithmetic number, because the mean of its divisors is an integer number (30307734).

Almost surely, 2^161603422 is an apocalyptic number.

161603422 is a deficient number, since it is larger than the sum of its proper divisors (80858450).

161603422 is a wasteful number, since it uses less digits than its factorization.

161603422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18914.

The product of its (nonzero) digits is 1728, while the sum is 25.

The square root of 161603422 is about 12712.3334600694. Note that the first 3 decimals coincide. The cubic root of 161603422 is about 544.6909810048.

Adding to 161603422 its reverse (224306161), we get a palindrome (385909583).

The spelling of 161603422 in words is "one hundred sixty-one million, six hundred three thousand, four hundred twenty-two".