28531159 has 2 divisors, whose sum is σ = 28531160. Its totient is φ = 28531158.

The previous prime is 28531147. The next prime is 28531163. The reversal of 28531159 is 95113582.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28531159 - 2⁵ = 28531127 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28531169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14265579 + 14265580.

It is an arithmetic number, because the mean of its divisors is an integer number (14265580).

Almost surely, 2^28531159 is an apocalyptic number.

28531159 is a deficient number, since it is larger than the sum of its proper divisors (1).

28531159 is an equidigital number, since it uses as much as digits as its factorization.

28531159 is an evil number, because the sum of its binary digits is even.

The product of its digits is 10800, while the sum is 34.

The square root of 28531159 is about 5341.4566365365. The cubic root of 28531159 is about 305.5670147450.

The spelling of 28531159 in words is "twenty-eight million, five hundred thirty-one thousand, one hundred fifty-nine".