28132051 has 4 divisors (see below), whose sum is σ = 28175400. Its totient is φ = 28088704.

The previous prime is 28132009. The next prime is 28132057. The reversal of 28132051 is 15023182.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 15023182 = 2 ⋅7511591.

It is a cyclic number.

It is not a de Polignac number, because 28132051 - 2¹³ = 28123859 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (28132057) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 20686 + ... + 22003.

It is an arithmetic number, because the mean of its divisors is an integer number (7043850).

Almost surely, 2^28132051 is an apocalyptic number.

28132051 is a deficient number, since it is larger than the sum of its proper divisors (43349).

28132051 is an equidigital number, since it uses as much as digits as its factorization.

28132051 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43348.

The product of its (nonzero) digits is 480, while the sum is 22.

The square root of 28132051 is about 5303.9655918944. The cubic root of 28132051 is about 304.1355113478.

The spelling of 28132051 in words is "twenty-eight million, one hundred thirty-two thousand, fifty-one".