28223161 has 2 divisors, whose sum is σ = 28223162. Its totient is φ = 28223160.

The previous prime is 28223141. The next prime is 28223183. The reversal of 28223161 is 16132282.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 16362025 + 11861136 = 4045^2 + 3444^2 .

It is a cyclic number.

It is not a de Polignac number, because 28223161 - 2¹¹ = 28221113 is a prime.

It is not a weakly prime, because it can be changed into another prime (28223131) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111580 + 14111581.

It is an arithmetic number, because the mean of its divisors is an integer number (14111581).

Almost surely, 2^28223161 is an apocalyptic number.

It is an amenable number.

28223161 is a deficient number, since it is larger than the sum of its proper divisors (1).

28223161 is an equidigital number, since it uses as much as digits as its factorization.

28223161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1152, while the sum is 25.

The square root of 28223161 is about 5312.5475056699. The cubic root of 28223161 is about 304.4634875057.

The spelling of 28223161 in words is "twenty-eight million, two hundred twenty-three thousand, one hundred sixty-one".