30803131 has 4 divisors (see below), whose sum is σ = 30862552. Its totient is φ = 30743712.

The previous prime is 30803111. The next prime is 30803147. The reversal of 30803131 is 13130803.

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 30803131 - 2¹¹ = 30801083 is a prime.

It is a super-2 number, since 2×30803131² = 1897665758806322, 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 = 30803099 and 30803108.

It is not an unprimeable number, because it can be changed into a prime (30803111) 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, 28926 + ... + 29971.

It is an arithmetic number, because the mean of its divisors is an integer number (7715638).

Almost surely, 2^30803131 is an apocalyptic number.

30803131 is a deficient number, since it is larger than the sum of its proper divisors (59421).

30803131 is an equidigital number, since it uses as much as digits as its factorization.

30803131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 59420.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 30803131 is about 5550.0568465557. The cubic root of 30803131 is about 313.4716628038.

Adding to 30803131 its reverse (13130803), we get a palindrome (43933934).

The spelling of 30803131 in words is "thirty million, eight hundred three thousand, one hundred thirty-one".