231387449850 has 192 divisors, whose sum is σ = 646574866560. Its totient is φ = 60840000000.

The previous prime is 231387449779. The next prime is 231387449921. The reversal of 231387449850 is 58944783132.

It is a happy number.

231387449850 is a `hidden beast` number, since 2 + 3 + 1 + 38 + 74 + 498 + 50 = 666.

It is an interprime number because it is at equal distance from previous prime (231387449779) and next prime (231387449921).

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 34220470 + ... + 34227230.

It is an arithmetic number, because the mean of its divisors is an integer number (3367577430).

Almost surely, 2^231387449850 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231387449850, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (323287433280).

231387449850 is an abundant number, since it is smaller than the sum of its proper divisors (415187416710).

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

231387449850 is a wasteful number, since it uses less digits than its factorization.

231387449850 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7134 (or 7123 counting only the distinct ones).

The product of its (nonzero) digits is 5806080, while the sum is 54.

The spelling of 231387449850 in words is "two hundred thirty-one billion, three hundred eighty-seven million, four hundred forty-nine thousand, eight hundred fifty".