16181422 has 4 divisors (see below), whose sum is σ = 24272136. Its totient is φ = 8090710.

The previous prime is 16181413. The next prime is 16181423. The reversal of 16181422 is 22418161.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 22418161 = 131 ⋅171131.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (16181423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 4045354 + ... + 4045357.

It is an arithmetic number, because the mean of its divisors is an integer number (6068034).

Almost surely, 2^16181422 is an apocalyptic number.

16181422 is a deficient number, since it is larger than the sum of its proper divisors (8090714).

16181422 is an equidigital number, since it uses as much as digits as its factorization.

16181422 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8090713.

The product of its digits is 768, while the sum is 25.

The square root of 16181422 is about 4022.6138268544. The cubic root of 16181422 is about 252.9330385679.

Adding to 16181422 its reverse (22418161), we get a palindrome (38599583).

The spelling of 16181422 in words is "sixteen million, one hundred eighty-one thousand, four hundred twenty-two".