161019422 has 8 divisors (see below), whose sum is σ = 241669656. Its totient is φ = 80462872.

The previous prime is 161019421. The next prime is 161019431. The reversal of 161019422 is 224910161.

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

It is a super-2 number, since 2×161019422² = 51854508522428168, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 161019391 and 161019400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161019421) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 18953 + ... + 26100.

It is an arithmetic number, because the mean of its divisors is an integer number (30208707).

Almost surely, 2^161019422 is an apocalyptic number.

161019422 is a deficient number, since it is larger than the sum of its proper divisors (80650234).

161019422 is a wasteful number, since it uses less digits than its factorization.

161019422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46842.

The product of its (nonzero) digits is 864, while the sum is 26.

The square root of 161019422 is about 12689.3428513852. The cubic root of 161019422 is about 544.0340570338.

Adding to 161019422 its reverse (224910161), we get a palindrome (385929583).

The spelling of 161019422 in words is "one hundred sixty-one million, nineteen thousand, four hundred twenty-two".