231387030 has 192 divisors, whose sum is σ = 727953408. Its totient is φ = 51788160.

The previous prime is 231387019. The next prime is 231387047. The reversal of 231387030 is 30783132.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 231386985 and 231387003.

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, 1037499 + ... + 1037721.

It is an arithmetic number, because the mean of its divisors is an integer number (3791424).

Almost surely, 2^231387030 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231387030, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (363976704).

231387030 is an abundant number, since it is smaller than the sum of its proper divisors (496566378).

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

231387030 is a wasteful number, since it uses less digits than its factorization.

231387030 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 313 (or 301 counting only the distinct ones).

The product of its (nonzero) digits is 3024, while the sum is 27.

The square root of 231387030 is about 15211.4111771394. The cubic root of 231387030 is about 613.9217274766.

The spelling of 231387030 in words is "two hundred thirty-one million, three hundred eighty-seven thousand, thirty".