30505133 has 2 divisors, whose sum is σ = 30505134. Its totient is φ = 30505132.

The previous prime is 30505121. The next prime is 30505151. The reversal of 30505133 is 33150503.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 30327049 + 178084 = 5507^2 + 422^2 .

It is an emirp because it is prime and its reverse (33150503) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 30505133 - 2²² = 26310829 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (30502133) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15252566 + 15252567.

It is an arithmetic number, because the mean of its divisors is an integer number (15252567).

Almost surely, 2^30505133 is an apocalyptic number.

It is an amenable number.

30505133 is a deficient number, since it is larger than the sum of its proper divisors (1).

30505133 is an equidigital number, since it uses as much as digits as its factorization.

30505133 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 675, while the sum is 20.

The square root of 30505133 is about 5523.1452090272. The cubic root of 30505133 is about 312.4575148643.

Adding to 30505133 its reverse (33150503), we get a palindrome (63655636).

The spelling of 30505133 in words is "thirty million, five hundred five thousand, one hundred thirty-three".