1528180133 has 4 divisors (see below), whose sum is σ = 1618073100. Its totient is φ = 1438287168.

The previous prime is 1528180097. The next prime is 1528180151. The reversal of 1528180133 is 3310818251.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 3310818251 = 13 ⋅254678327.

It can be written as a sum of positive squares in 2 ways, for example, as 470759809 + 1057420324 = 21697^2 + 32518^2 .

It is a cyclic number.

It is not a de Polignac number, because 1528180133 - 2¹⁶ = 1528114597 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1528180133.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1528180183) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 44946458 + ... + 44946491.

It is an arithmetic number, because the mean of its divisors is an integer number (404518275).

Almost surely, 2^1528180133 is an apocalyptic number.

It is an amenable number.

1528180133 is a deficient number, since it is larger than the sum of its proper divisors (89892967).

1528180133 is an equidigital number, since it uses as much as digits as its factorization.

1528180133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 89892966.

The product of its (nonzero) digits is 5760, while the sum is 32.

The square root of 1528180133 is about 39091.9446049950. The cubic root of 1528180133 is about 1151.8383032137.

Adding to 1528180133 its reverse (3310818251), we get a palindrome (4838998384).

The spelling of 1528180133 in words is "one billion, five hundred twenty-eight million, one hundred eighty thousand, one hundred thirty-three".