30131236 has 12 divisors (see below), whose sum is σ = 52778880. Its totient is φ = 15051560.

The previous prime is 30131201. The next prime is 30131243. The reversal of 30131236 is 63213103.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2421 + ... + 8131.

It is an arithmetic number, because the mean of its divisors is an integer number (4398240).

Almost surely, 2^30131236 is an apocalyptic number.

It is an amenable number.

30131236 is a deficient number, since it is larger than the sum of its proper divisors (22647644).

30131236 is a wasteful number, since it uses less digits than its factorization.

30131236 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7034 (or 7032 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 19.

The square root of 30131236 is about 5489.1926546624. The cubic root of 30131236 is about 311.1756812500.

Adding to 30131236 its reverse (63213103), we get a palindrome (93344339).

The spelling of 30131236 in words is "thirty million, one hundred thirty-one thousand, two hundred thirty-six".