28153331 has 2 divisors, whose sum is σ = 28153332. Its totient is φ = 28153330.

The previous prime is 28153313. The next prime is 28153339. The reversal of 28153331 is 13335182.

Together with previous prime (28153313) it forms an Ormiston pair, because they use the same digits, order apart.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 28153331 - 2¹⁰ = 28152307 is a prime.

It is a super-2 number, since 2×28153331² = 1585220092791122, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 28153331.

It is not a weakly prime, because it can be changed into another prime (28153339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14076665 + 14076666.

It is an arithmetic number, because the mean of its divisors is an integer number (14076666).

Almost surely, 2^28153331 is an apocalyptic number.

28153331 is a deficient number, since it is larger than the sum of its proper divisors (1).

28153331 is an equidigital number, since it uses as much as digits as its factorization.

28153331 is an evil number, because the sum of its binary digits is even.

The product of its digits is 2160, while the sum is 26.

The square root of 28153331 is about 5305.9712588743. The cubic root of 28153331 is about 304.2121780235.

The spelling of 28153331 in words is "twenty-eight million, one hundred fifty-three thousand, three hundred thirty-one".