231550000000 has 288 divisors, whose sum is σ = 630527020920. Its totient is φ = 84000000000.

The previous prime is 231549999971. The next prime is 231550000021. The reversal of 231550000000 is 55132.

231550000000 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a hoax number, since the sum of its digits (16) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 549999790 + ... + 550000210.

Almost surely, 2^231550000000 is an apocalyptic number.

231550000000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231550000000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (315263510460).

231550000000 is an abundant number, since it is smaller than the sum of its proper divisors (398977020920).

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

231550000000 is an frugal number, since it uses more digits than its factorization.

231550000000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 486 (or 439 counting only the distinct ones).

The product of its (nonzero) digits is 150, while the sum is 16.

Adding to 231550000000 its reverse (55132), we get a palindrome (231550055132).

The spelling of 231550000000 in words is "two hundred thirty-one billion, five hundred fifty million", and thus it is an aban number.