28571051 has 4 divisors (see below), whose sum is σ = 28620312. Its totient is φ = 28521792.

The previous prime is 28571021. The next prime is 28571077. The reversal of 28571051 is 15017582.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15017582 = 2 ⋅7508791.

It is a cyclic number.

It is not a de Polignac number, because 28571051 - 2¹⁴ = 28554667 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28571021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 23750 + ... + 24923.

It is an arithmetic number, because the mean of its divisors is an integer number (7155078).

Almost surely, 2^28571051 is an apocalyptic number.

28571051 is a deficient number, since it is larger than the sum of its proper divisors (49261).

28571051 is an equidigital number, since it uses as much as digits as its factorization.

28571051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 49260.

The product of its (nonzero) digits is 2800, while the sum is 29.

The square root of 28571051 is about 5345.1895195587. The cubic root of 28571051 is about 305.7093620713.

The spelling of 28571051 in words is "twenty-eight million, five hundred seventy-one thousand, fifty-one".