28575251 has 2 divisors, whose sum is σ = 28575252. Its totient is φ = 28575250.

The previous prime is 28575233. The next prime is 28575257. The reversal of 28575251 is 15257582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28575251 - 2¹⁴ = 28558867 is a prime.

It is not a weakly prime, because it can be changed into another prime (28575257) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14287625 + 14287626.

It is an arithmetic number, because the mean of its divisors is an integer number (14287626).

Almost surely, 2^28575251 is an apocalyptic number.

28575251 is a deficient number, since it is larger than the sum of its proper divisors (1).

28575251 is an equidigital number, since it uses as much as digits as its factorization.

28575251 is an evil number, because the sum of its binary digits is even.

The product of its digits is 28000, while the sum is 35.

The square root of 28575251 is about 5345.5823817429. The cubic root of 28575251 is about 305.7243412940.

The spelling of 28575251 in words is "twenty-eight million, five hundred seventy-five thousand, two hundred fifty-one".