22171049 has 4 divisors (see below), whose sum is σ = 22474836. Its totient is φ = 21867264.

The previous prime is 22171033. The next prime is 22171063. The reversal of 22171049 is 94017122.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 94017122 = 2 ⋅47008561.

It can be written as a sum of positive squares in 2 ways, for example, as 7463824 + 14707225 = 2732^2 + 3835^2 .

It is a cyclic number.

It is not a de Polignac number, because 22171049 - 2⁴ = 22171033 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22101049) 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, 151784 + ... + 151929.

It is an arithmetic number, because the mean of its divisors is an integer number (5618709).

Almost surely, 2^22171049 is an apocalyptic number.

It is an amenable number.

22171049 is a deficient number, since it is larger than the sum of its proper divisors (303787).

22171049 is an equidigital number, since it uses as much as digits as its factorization.

22171049 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 303786.

The product of its (nonzero) digits is 1008, while the sum is 26.

The square root of 22171049 is about 4708.6143396970. The cubic root of 22171049 is about 280.9282500667.

The spelling of 22171049 in words is "twenty-two million, one hundred seventy-one thousand, forty-nine".