28131151 has 2 divisors, whose sum is σ = 28131152. Its totient is φ = 28131150.

The previous prime is 28131143. The next prime is 28131163. The reversal of 28131151 is 15113182.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 28131151 - 2³ = 28131143 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28131121) 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 as a sum of consecutive naturals, namely, 14065575 + 14065576.

It is an arithmetic number, because the mean of its divisors is an integer number (14065576).

Almost surely, 2^28131151 is an apocalyptic number.

28131151 is a deficient number, since it is larger than the sum of its proper divisors (1).

28131151 is an equidigital number, since it uses as much as digits as its factorization.

28131151 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 240, while the sum is 22.

The square root of 28131151 is about 5303.8807490365. The cubic root of 28131151 is about 304.1322680142.

It can be divided in two parts, 28131 and 151, that added together give a palindrome (28282).

The spelling of 28131151 in words is "twenty-eight million, one hundred thirty-one thousand, one hundred fifty-one".