30131232 has 96 divisors (see below), whose sum is σ = 83462400. Its totient is φ = 9504768.

The previous prime is 30131201. The next prime is 30131243. The reversal of 30131232 is 23213103.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×30131232² = 1815782283675648, which contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 219868 + ... + 220004.

It is an arithmetic number, because the mean of its divisors is an integer number (869400).

Almost surely, 2^30131232 is an apocalyptic number.

30131232 is a gapful number since it is divisible by the number (32) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 30131232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (41731200).

30131232 is an abundant number, since it is smaller than the sum of its proper divisors (53331168).

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

30131232 is a wasteful number, since it uses less digits than its factorization.

30131232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 258 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 108, while the sum is 15.

The square root of 30131232 is about 5489.1922903101. The cubic root of 30131232 is about 311.1756674803.

Adding to 30131232 its reverse (23213103), we get a palindrome (53344335).

The spelling of 30131232 in words is "thirty million, one hundred thirty-one thousand, two hundred thirty-two".