22071161 has 16 divisors (see below), whose sum is σ = 26345088. Its totient is φ = 18096000.

The previous prime is 22071157. The next prime is 22071173. The reversal of 22071161 is 16117022.

It is a cyclic number.

It is not a de Polignac number, because 22071161 - 2² = 22071157 is a prime.

It is a super-2 number, since 2×22071161² = 974272295775842, which contains 22 as substring.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (22071121) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 14486 + ... + 15936.

It is an arithmetic number, because the mean of its divisors is an integer number (1646568).

Almost surely, 2^22071161 is an apocalyptic number.

It is an amenable number.

22071161 is a deficient number, since it is larger than the sum of its proper divisors (4273927).

22071161 is a wasteful number, since it uses less digits than its factorization.

22071161 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1552.

The product of its (nonzero) digits is 168, while the sum is 20.

The square root of 22071161 is about 4697.9954235823. The cubic root of 22071161 is about 280.5057229416.

Adding to 22071161 its reverse (16117022), we get a palindrome (38188183).

The spelling of 22071161 in words is "twenty-two million, seventy-one thousand, one hundred sixty-one".