31340232 has 96 divisors (see below), whose sum is σ = 105842880. Its totient is φ = 8138880.

The previous prime is 31340227. The next prime is 31340233. The reversal of 31340232 is 23204313.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is not an unprimeable number, because it can be changed into a prime (31340233) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2718 + ... + 8370.

It is an arithmetic number, because the mean of its divisors is an integer number (1102530).

Almost surely, 2^31340232 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 31340232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (52921440).

31340232 is an abundant number, since it is smaller than the sum of its proper divisors (74502648).

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

31340232 is a wasteful number, since it uses less digits than its factorization.

31340232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5683 (or 5676 counting only the distinct ones).

The product of its (nonzero) digits is 432, while the sum is 18.

The square root of 31340232 is about 5598.2347217672. The cubic root of 31340232 is about 315.2831316797.

Adding to 31340232 its reverse (23204313), we get a palindrome (54544545).

The spelling of 31340232 in words is "thirty-one million, three hundred forty thousand, two hundred thirty-two".