30533306057 has 4 divisors (see below), whose sum is σ = 30533662740. Its totient is φ = 30532949376.

The previous prime is 30533306029. The next prime is 30533306113. The reversal of 30533306057 is 75060333503.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length, and also an emirpimes, since its reverse is a distinct semiprime: 75060333503 = 23 ⋅3263492761.

It can be written as a sum of positive squares in 2 ways, for example, as 8699106361 + 21834199696 = 93269^2 + 147764^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30533306057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30533356057) 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, 35669 + ... + 249677.

It is an arithmetic number, because the mean of its divisors is an integer number (7633415685).

It is a Poulet number, since it divides 2^30533306056-1.

Almost surely, 2^30533306057 is an apocalyptic number.

30533306057 is the 142673-rd pentagonal number.

It is an amenable number.

30533306057 is a deficient number, since it is larger than the sum of its proper divisors (356683).

30533306057 is a wasteful number, since it uses less digits than its factorization.

30533306057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 356682.

The product of its (nonzero) digits is 85050, while the sum is 35.

The spelling of 30533306057 in words is "thirty billion, five hundred thirty-three million, three hundred six thousand, fifty-seven".