231555001600 has 216 divisors, whose sum is σ = 626449453280. Its totient is φ = 84219125760.

The previous prime is 231555001571. The next prime is 231555001603. The reversal of 231555001600 is 6100555132.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231555001603) by changing a digit.

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 23 ways as a sum of consecutive naturals, for example, 5553631 + ... + 5595169.

Almost surely, 2^231555001600 is an apocalyptic number.

231555001600 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 231555001600, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (313224726640).

231555001600 is an abundant number, since it is smaller than the sum of its proper divisors (394894451680).

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

231555001600 is a wasteful number, since it uses less digits than its factorization.

231555001600 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41645 (or 41626 counting only the distinct ones).

The product of its (nonzero) digits is 4500, while the sum is 28.

Adding to 231555001600 its reverse (6100555132), we get a palindrome (237655556732).

The spelling of 231555001600 in words is "two hundred thirty-one billion, five hundred fifty-five million, one thousand, six hundred".