28222471 has 2 divisors, whose sum is σ = 28222472. Its totient is φ = 28222470.

The previous prime is 28222463. The next prime is 28222483. The reversal of 28222471 is 17422282.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28222471 - 2³ = 28222463 is a prime.

It is a super-3 number, since 3×28222471³ (a number of 23 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28222451) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14111235 + 14111236.

It is an arithmetic number, because the mean of its divisors is an integer number (14111236).

Almost surely, 2^28222471 is an apocalyptic number.

28222471 is a deficient number, since it is larger than the sum of its proper divisors (1).

28222471 is an equidigital number, since it uses as much as digits as its factorization.

28222471 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3584, while the sum is 28.

The square root of 28222471 is about 5312.4825646773. The cubic root of 28222471 is about 304.4610063105.

The spelling of 28222471 in words is "twenty-eight million, two hundred twenty-two thousand, four hundred seventy-one".