22165481 has 8 divisors (see below), whose sum is σ = 23918664. Its totient is φ = 20419200.

The previous prime is 22165463. The next prime is 22165487. The reversal of 22165481 is 18456122.

It can be written as a sum of positive squares in 4 ways, for example, as 160000 + 22005481 = 400^2 + 4691^2 .

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-22165481 is a prime.

It is a super-2 number, since 2×22165481² = 982617095922722, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22165487) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6395 + ... + 9231.

It is an arithmetic number, because the mean of its divisors is an integer number (2989833).

Almost surely, 2^22165481 is an apocalyptic number.

It is an amenable number.

22165481 is a deficient number, since it is larger than the sum of its proper divisors (1753183).

22165481 is a wasteful number, since it uses less digits than its factorization.

22165481 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3451.

The product of its digits is 3840, while the sum is 29.

The square root of 22165481 is about 4708.0230458229. The cubic root of 22165481 is about 280.9047308148.

The spelling of 22165481 in words is "twenty-two million, one hundred sixty-five thousand, four hundred eighty-one".