31230 has 24 divisors (see below), whose sum is σ = 81432. Its totient is φ = 8304.

The previous prime is 31223. The next prime is 31231. The reversal of 31230 is 3213.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (31231) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 84 + ... + 263.

It is an arithmetic number, because the mean of its divisors is an integer number (3393).

2³¹²³⁰ is an apocalyptic number.

31230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

31230 is an abundant number, since it is smaller than the sum of its proper divisors (50202).

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

It is a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (40716).

31230 is a wasteful number, since it uses less digits than its factorization.

31230 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 360 (or 357 counting only the distinct ones).

The product of its (nonzero) digits is 18, while the sum is 9.

The square root of 31230 is about 176.7201177003. The cubic root of 31230 is about 31.4913052344.

Adding to 31230 its reverse (3213), we get a palindrome (34443).

The spelling of 31230 in words is "thirty-one thousand, two hundred thirty".