28057731133 has 2 divisors, whose sum is σ = 28057731134. Its totient is φ = 28057731132.

The previous prime is 28057731103. The next prime is 28057731173. The reversal of 28057731133 is 33113775082.

It is an a-pointer prime, because the next prime (28057731173) can be obtained adding 28057731133 to its sum of digits (40).

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24963368004 + 3094363129 = 157998^2 + 55627^2 .

It is a cyclic number.

It is not a de Polignac number, because 28057731133 - 2¹³ = 28057722941 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (28057731103) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 14028865566 + 14028865567.

It is an arithmetic number, because the mean of its divisors is an integer number (14028865567).

Almost surely, 2^28057731133 is an apocalyptic number.

It is an amenable number.

28057731133 is a deficient number, since it is larger than the sum of its proper divisors (1).

28057731133 is an equidigital number, since it uses as much as digits as its factorization.

28057731133 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 105840, while the sum is 40.

The spelling of 28057731133 in words is "twenty-eight billion, fifty-seven million, seven hundred thirty-one thousand, one hundred thirty-three".