30802133 has 4 divisors (see below), whose sum is σ = 31307148. Its totient is φ = 30297120.

The previous prime is 30802091. The next prime is 30802151. The reversal of 30802133 is 33120803.

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

It can be written as a sum of positive squares in 2 ways, for example, as 1620529 + 29181604 = 1273^2 + 5402^2 .

It is a cyclic number.

It is not a de Polignac number, because 30802133 - 2⁸ = 30801877 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30802153) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 252416 + ... + 252537.

It is an arithmetic number, because the mean of its divisors is an integer number (7826787).

Almost surely, 2^30802133 is an apocalyptic number.

It is an amenable number.

30802133 is a deficient number, since it is larger than the sum of its proper divisors (505015).

30802133 is an equidigital number, since it uses as much as digits as its factorization.

30802133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 505014.

The product of its (nonzero) digits is 432, while the sum is 20.

The square root of 30802133 is about 5549.9669368385. The cubic root of 30802133 is about 313.4682773461.

Adding to 30802133 its reverse (33120803), we get a palindrome (63922936).

The spelling of 30802133 in words is "thirty million, eight hundred two thousand, one hundred thirty-three".