30556057 has 12 divisors (see below), whose sum is σ = 36049536. Its totient is φ = 25819080.

The previous prime is 30555977. The next prime is 30556081. The reversal of 30556057 is 75065503.

It is not a de Polignac number, because 30556057 - 2¹¹ = 30554009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (30557057) 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, 913 + ... + 7870.

It is an arithmetic number, because the mean of its divisors is an integer number (3004128).

Almost surely, 2^30556057 is an apocalyptic number.

It is an amenable number.

30556057 is a deficient number, since it is larger than the sum of its proper divisors (5493479).

30556057 is an equidigital number, since it uses as much as digits as its factorization.

30556057 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8868 (or 8861 counting only the distinct ones).

The product of its (nonzero) digits is 15750, while the sum is 31.

The square root of 30556057 is about 5527.7533410962. The cubic root of 30556057 is about 312.6312860636.

The spelling of 30556057 in words is "thirty million, five hundred fifty-six thousand, fifty-seven".