161931422 has 8 divisors (see below), whose sum is σ = 243071400. Its totient is φ = 80907624.

The previous prime is 161931391. The next prime is 161931437. The reversal of 161931422 is 224139161.

161931422 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 25472 + ... + 31187.

It is an arithmetic number, because the mean of its divisors is an integer number (30383925).

Almost surely, 2^161931422 is an apocalyptic number.

161931422 is a deficient number, since it is larger than the sum of its proper divisors (81139978).

161931422 is a wasteful number, since it uses less digits than its factorization.

161931422 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 58090.

The product of its digits is 2592, while the sum is 29.

The square root of 161931422 is about 12725.2277779221. The cubic root of 161931422 is about 545.0592444644.

The spelling of 161931422 in words is "one hundred sixty-one million, nine hundred thirty-one thousand, four hundred twenty-two".