30253133 has 4 divisors (see below), whose sum is σ = 30749148. Its totient is φ = 29757120.

The previous prime is 30253127. The next prime is 30253163. The reversal of 30253133 is 33135203.

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 8369449 + 21883684 = 2893^2 + 4678^2 .

It is a cyclic number.

It is not a de Polignac number, because 30253133 - 2¹⁰ = 30252109 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30253103) 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, 247916 + ... + 248037.

It is an arithmetic number, because the mean of its divisors is an integer number (7687287).

Almost surely, 2^30253133 is an apocalyptic number.

It is an amenable number.

30253133 is a deficient number, since it is larger than the sum of its proper divisors (496015).

30253133 is an equidigital number, since it uses as much as digits as its factorization.

30253133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 496014.

The product of its (nonzero) digits is 810, while the sum is 20.

The square root of 30253133 is about 5500.2848108075. The cubic root of 30253133 is about 311.5947407906.

Adding to 30253133 its reverse (33135203), we get a palindrome (63388336).

It can be divided in two parts, 302 and 53133, that added together give a palindrome (53435).

The spelling of 30253133 in words is "thirty million, two hundred fifty-three thousand, one hundred thirty-three".