231200550 has 144 divisors (see below), whose sum is σ = 747452160. Its totient is φ = 50051520.

The previous prime is 231200539. The next prime is 231200587. The reversal of 231200550 is 55002132.

It is a happy number.

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

It is a Curzon number.

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 71 ways as a sum of consecutive naturals, for example, 57919 + ... + 61781.

It is an arithmetic number, because the mean of its divisors is an integer number (5190640).

Almost surely, 2^231200550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231200550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (373726080).

231200550 is an abundant number, since it is smaller than the sum of its proper divisors (516251610).

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

231200550 is a wasteful number, since it uses less digits than its factorization.

231200550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3907 (or 3899 counting only the distinct ones).

The product of its (nonzero) digits is 300, while the sum is 18.

The square root of 231200550 is about 15205.2803328317. The cubic root of 231200550 is about 613.7567587190.

Adding to 231200550 its reverse (55002132), we get a palindrome (286202682).

The spelling of 231200550 in words is "two hundred thirty-one million, two hundred thousand, five hundred fifty".