31148032 has 48 divisors (see below), whose sum is σ = 63488880. Its totient is φ = 15273984.

The previous prime is 31148023. The next prime is 31148071. The reversal of 31148032 is 23084113.

It is a junction number, because it is equal to n+sod(n) for n = 31147994 and 31148012.

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, 137103 + ... + 137329.

It is an arithmetic number, because the mean of its divisors is an integer number (1322685).

Almost surely, 2^31148032 is an apocalyptic number.

31148032 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 31148032, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31744440).

31148032 is an abundant number, since it is smaller than the sum of its proper divisors (32340848).

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

31148032 is an equidigital number, since it uses as much as digits as its factorization.

31148032 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 316 (or 296 counting only the distinct ones).

The product of its (nonzero) digits is 576, while the sum is 22.

The square root of 31148032 is about 5581.0421965794. The cubic root of 31148032 is about 314.6372981624.

The spelling of 31148032 in words is "thirty-one million, one hundred forty-eight thousand, thirty-two".