30131432 has 16 divisors (see below), whose sum is σ = 56811300. Its totient is φ = 14981760.

The previous prime is 30131419. The next prime is 30131443. The reversal of 30131432 is 23413103.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 23951236 + 6180196 = 4894^2 + 2486^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 30131432.

It is an unprimeable number.

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, 8957 + ... + 11852.

Almost surely, 2^30131432 is an apocalyptic number.

It is an amenable number.

30131432 is a deficient number, since it is larger than the sum of its proper divisors (26679868).

30131432 is a wasteful number, since it uses less digits than its factorization.

30131432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20996 (or 20992 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 30131432 is about 5489.2105078964. The cubic root of 30131432 is about 311.1763559685.

Adding to 30131432 its reverse (23413103), we get a palindrome (53544535).

The spelling of 30131432 in words is "thirty million, one hundred thirty-one thousand, four hundred thirty-two".