1231230330 has 144 divisors (see below), whose sum is σ = 3574437984. Its totient is φ = 291610560.

The previous prime is 1231230323. The next prime is 1231230397. The reversal of 1231230330 is 330321321.

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

It is an unprimeable number.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 2186629 + ... + 2187191.

It is an arithmetic number, because the mean of its divisors is an integer number (24822486).

Almost surely, 2^1231230330 is an apocalyptic number.

1231230330 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is a practical number, because each smaller number is the sum of distinct divisors of 1231230330, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1787218992).

1231230330 is an abundant number, since it is smaller than the sum of its proper divisors (2343207654).

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

1231230330 is a wasteful number, since it uses less digits than its factorization.

1231230330 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 681 (or 631 counting only the distinct ones).

The product of its (nonzero) digits is 324, while the sum is 18.

The square root of 1231230330 is about 35088.8918320314. The cubic root of 1231230330 is about 1071.7983935538.

Adding to 1231230330 its reverse (330321321), we get a palindrome (1561551651).

Subtracting from 1231230330 its reverse (330321321), we obtain a palindrome (900909009).

The spelling of 1231230330 in words is "one billion, two hundred thirty-one million, two hundred thirty thousand, three hundred thirty".