30531232 has 24 divisors (see below), whose sum is σ = 61097652. Its totient is φ = 15014400.

The previous prime is 30531223. The next prime is 30531239. The reversal of 30531232 is 23213503.

It can be written as a sum of positive squares in 2 ways, for example, as 30426256 + 104976 = 5516^2 + 324^2 .

It is a super-2 number, since 2×30531232² = 1864312254875648, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (30531239) 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, 5869 + ... + 9772.

Almost surely, 2^30531232 is an apocalyptic number.

30531232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

30531232 is an abundant number, since it is smaller than the sum of its proper divisors (30566420).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

30531232 is a wasteful number, since it uses less digits than its factorization.

30531232 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15712 (or 15704 counting only the distinct ones).

The product of its (nonzero) digits is 540, while the sum is 19.

The square root of 30531232 is about 5525.5073975156. The cubic root of 30531232 is about 312.5465982778.

Adding to 30531232 its reverse (23213503), we get a palindrome (53744735).

The spelling of 30531232 in words is "thirty million, five hundred thirty-one thousand, two hundred thirty-two".