231550 has 24 divisors (see below), whose sum is σ = 470952. Its totient is φ = 84000.

The previous prime is 231547. The next prime is 231551. The reversal of 231550 is 55132.

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 congruent number.

It is not an unprimeable number, because it can be changed into a prime (231551) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 340 + ... + 760.

It is an arithmetic number, because the mean of its divisors is an integer number (19623).

2²³¹⁵⁵⁰ is an apocalyptic number.

231550 is an abundant number, since it is smaller than the sum of its proper divisors (239402).

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

231550 is a wasteful number, since it uses less digits than its factorization.

231550 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 444 (or 439 counting only the distinct ones).

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

The square root of 231550 is about 481.1964255894. The cubic root of 231550 is about 61.4065825648.

Adding to 231550 its reverse (55132), we get a palindrome (286682).

The spelling of 231550 in words is "two hundred thirty-one thousand, five hundred fifty".