30815132 has 12 divisors (see below), whose sum is σ = 54014856. Its totient is φ = 15382320.

The previous prime is 30815129. The next prime is 30815143. The reversal of 30815132 is 23151803.

It is a junction number, because it is equal to n+sod(n) for n = 30815098 and 30815107.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3419 + ... + 8562.

It is an arithmetic number, because the mean of its divisors is an integer number (4501238).

Almost surely, 2^30815132 is an apocalyptic number.

It is an amenable number.

30815132 is a deficient number, since it is larger than the sum of its proper divisors (23199724).

30815132 is a wasteful number, since it uses less digits than its factorization.

30815132 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12628 (or 12626 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 23.

The square root of 30815132 is about 5551.1379013676. The cubic root of 30815132 is about 313.5123673778.

Adding to 30815132 its reverse (23151803), we get a palindrome (53966935).

The spelling of 30815132 in words is "thirty million, eight hundred fifteen thousand, one hundred thirty-two".