231032550 has 216 divisors, whose sum is σ = 722505096. Its totient is φ = 48545280.

The previous prime is 231032537. The next prime is 231032579. The reversal of 231032550 is 55230132.

It is a Harshad number since it is a multiple of its sum of digits (21).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 107 ways as a sum of consecutive naturals, for example, 5372829 + ... + 5372871.

It is an arithmetic number, because the mean of its divisors is an integer number (3344931).

Almost surely, 2^231032550 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231032550, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (361252548).

231032550 is an abundant number, since it is smaller than the sum of its proper divisors (491472546).

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

231032550 is a wasteful number, since it uses less digits than its factorization.

231032550 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 132 (or 77 counting only the distinct ones).

The product of its (nonzero) digits is 900, while the sum is 21.

The square root of 231032550 is about 15199.7549322349. The cubic root of 231032550 is about 613.6080622438.

Adding to 231032550 its reverse (55230132), we get a palindrome (286262682).

The spelling of 231032550 in words is "two hundred thirty-one million, thirty-two thousand, five hundred fifty".