28555151 has 4 divisors (see below), whose sum is σ = 28849632. Its totient is φ = 28260672.

The previous prime is 28555133. The next prime is 28555171. The reversal of 28555151 is 15155582.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 28555151 - 2¹⁸ = 28293007 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (28555171) 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, 147095 + ... + 147288.

It is an arithmetic number, because the mean of its divisors is an integer number (7212408).

Almost surely, 2^28555151 is an apocalyptic number.

28555151 is a deficient number, since it is larger than the sum of its proper divisors (294481).

28555151 is an equidigital number, since it uses as much as digits as its factorization.

28555151 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294480.

The product of its digits is 10000, while the sum is 32.

The square root of 28555151 is about 5343.7019939364. The cubic root of 28555151 is about 305.6526417121.

The spelling of 28555151 in words is "twenty-eight million, five hundred fifty-five thousand, one hundred fifty-one".