30557131 has 4 divisors (see below), whose sum is σ = 33335064. Its totient is φ = 27779200.

The previous prime is 30557129. The next prime is 30557141. The reversal of 30557131 is 13175503.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 30557131 - 2¹ = 30557129 is a prime.

It is a super-2 number, since 2×30557131² = 1867476509902322, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 30557096 and 30557105.

It is not an unprimeable number, because it can be changed into a prime (30557101) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1388950 + ... + 1388971.

It is an arithmetic number, because the mean of its divisors is an integer number (8333766).

Almost surely, 2^30557131 is an apocalyptic number.

30557131 is a deficient number, since it is larger than the sum of its proper divisors (2777933).

30557131 is a wasteful number, since it uses less digits than its factorization.

30557131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2777932.

The product of its (nonzero) digits is 1575, while the sum is 25.

The square root of 30557131 is about 5527.8504864007. The cubic root of 30557131 is about 312.6349488625.

The spelling of 30557131 in words is "thirty million, five hundred fifty-seven thousand, one hundred thirty-one".