30305133 has 12 divisors (see below), whose sum is σ = 46078240. Its totient is φ = 19139976.

The previous prime is 30305129. The next prime is 30305137. The reversal of 30305133 is 33150303.

It is an interprime number because it is at equal distance from previous prime (30305129) and next prime (30305137).

It is not a de Polignac number, because 30305133 - 2² = 30305129 is a prime.

It is a super-2 number, since 2×30305133² = 1836802172295378, which contains 22 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 (30305137) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 88441 + ... + 88782.

Almost surely, 2^30305133 is an apocalyptic number.

It is an amenable number.

30305133 is a deficient number, since it is larger than the sum of its proper divisors (15773107).

30305133 is a wasteful number, since it uses less digits than its factorization.

30305133 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 177248 (or 177245 counting only the distinct ones).

The product of its (nonzero) digits is 405, while the sum is 18.

The square root of 30305133 is about 5505.0098092556. The cubic root of 30305133 is about 311.7731647577.

Adding to 30305133 its reverse (33150303), we get a palindrome (63455436).

The spelling of 30305133 in words is "thirty million, three hundred five thousand, one hundred thirty-three".