30545057 has 4 divisors (see below), whose sum is σ = 30557460. Its totient is φ = 30532656.

The previous prime is 30545051. The next prime is 30545101. The reversal of 30545057 is 75054503.

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.

It can be written as a sum of positive squares in 2 ways, for example, as 23580736 + 6964321 = 4856^2 + 2639^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-30545057 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30545051) 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, 1118 + ... + 7895.

It is an arithmetic number, because the mean of its divisors is an integer number (7639365).

Almost surely, 2^30545057 is an apocalyptic number.

It is an amenable number.

30545057 is a deficient number, since it is larger than the sum of its proper divisors (12403).

30545057 is an equidigital number, since it uses as much as digits as its factorization.

30545057 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12402.

The product of its (nonzero) digits is 10500, while the sum is 29.

The square root of 30545057 is about 5526.7582722605. The cubic root of 30545057 is about 312.5937664223.

The spelling of 30545057 in words is "thirty million, five hundred forty-five thousand, fifty-seven".