31030230 has 192 divisors, whose sum is σ = 100465920. Its totient is φ = 6048000.

The previous prime is 31030213. The next prime is 31030267. The reversal of 31030230 is 3203013.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 307180 + ... + 307280.

It is an arithmetic number, because the mean of its divisors is an integer number (523260).

Almost surely, 2^31030230 is an apocalyptic number.

31030230 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 31030230, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (50232960).

31030230 is an abundant number, since it is smaller than the sum of its proper divisors (69435690).

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

31030230 is a wasteful number, since it uses less digits than its factorization.

31030230 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 155 (or 148 counting only the distinct ones).

The product of its (nonzero) digits is 54, while the sum is 12.

The square root of 31030230 is about 5570.4784354667. The cubic root of 31030230 is about 314.2401438256.

Adding to 31030230 its reverse (3203013), we get a palindrome (34233243).

The spelling of 31030230 in words is "thirty-one million, thirty thousand, two hundred thirty".