30538133 has 4 divisors (see below), whose sum is σ = 30714828. Its totient is φ = 30361440.

The previous prime is 30538117. The next prime is 30538141. The reversal of 30538133 is 33183503.

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 29571844 + 966289 = 5438^2 + 983^2 .

It is a cyclic number.

It is not a de Polignac number, because 30538133 - 2⁴ = 30538117 is a prime.

It is a super-3 number, since 3×30538133³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (30538033) 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, 88088 + ... + 88433.

It is an arithmetic number, because the mean of its divisors is an integer number (7678707).

Almost surely, 2^30538133 is an apocalyptic number.

It is an amenable number.

30538133 is a deficient number, since it is larger than the sum of its proper divisors (176695).

30538133 is a wasteful number, since it uses less digits than its factorization.

30538133 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176694.

The product of its (nonzero) digits is 3240, while the sum is 26.

The square root of 30538133 is about 5526.1318297703. The cubic root of 30538133 is about 312.5701448938.

The spelling of 30538133 in words is "thirty million, five hundred thirty-eight thousand, one hundred thirty-three".