30531712 has 16 divisors (see below), whose sum is σ = 60825150. Its totient is φ = 15265792.

The previous prime is 30531703. The next prime is 30531731. The reversal of 30531712 is 21713503.

It can be written as a sum of positive squares in only one way, i.e., 25969216 + 4562496 = 5096^2 + 2136^2 .

It is a tau number, because it is divible by the number of its divisors (16).

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 119137 + ... + 119392.

Almost surely, 2^30531712 is an apocalyptic number.

30531712 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30531712 is a deficient number, since it is larger than the sum of its proper divisors (30293438).

30531712 is an equidigital number, since it uses as much as digits as its factorization.

30531712 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 238543 (or 238531 counting only the distinct ones).

The product of its (nonzero) digits is 630, while the sum is 22.

The square root of 30531712 is about 5525.5508322700. The cubic root of 30531712 is about 312.5482361808.

The spelling of 30531712 in words is "thirty million, five hundred thirty-one thousand, seven hundred twelve".