28251143 has 2 divisors, whose sum is σ = 28251144. Its totient is φ = 28251142.

The previous prime is 28251109. The next prime is 28251151. The reversal of 28251143 is 34115282.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28251143 - 2⁶ = 28251079 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28251193) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14125571 + 14125572.

It is an arithmetic number, because the mean of its divisors is an integer number (14125572).

Almost surely, 2^28251143 is an apocalyptic number.

28251143 is a deficient number, since it is larger than the sum of its proper divisors (1).

28251143 is an equidigital number, since it uses as much as digits as its factorization.

28251143 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1920, while the sum is 26.

The square root of 28251143 is about 5315.1804296750. The cubic root of 28251143 is about 304.5640749073.

The spelling of 28251143 in words is "twenty-eight million, two hundred fifty-one thousand, one hundred forty-three".