22161262 has 4 divisors (see below), whose sum is σ = 33241896. Its totient is φ = 11080630.

The previous prime is 22161241. The next prime is 22161281. The reversal of 22161262 is 26216122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 26216122 = 2 ⋅13108061.

It is a super-2 number, since 2×22161262² = 982243066865288, which contains 22 as substring.

It is a Smith number, since the sum of its digits (22) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5540314 + ... + 5540317.

It is an arithmetic number, because the mean of its divisors is an integer number (8310474).

Almost surely, 2^22161262 is an apocalyptic number.

22161262 is a deficient number, since it is larger than the sum of its proper divisors (11080634).

22161262 is a wasteful number, since it uses less digits than its factorization.

22161262 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11080633.

The product of its digits is 576, while the sum is 22.

The square root of 22161262 is about 4707.5749595731. The cubic root of 22161262 is about 280.8869071207.

Adding to 22161262 its reverse (26216122), we get a palindrome (48377384).

The spelling of 22161262 in words is "twenty-two million, one hundred sixty-one thousand, two hundred sixty-two".