231553 has 8 divisors (see below), whose sum is σ = 278720. Its totient is φ = 187920.

The previous prime is 231551. The next prime is 231559. The reversal of 231553 is 355132.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 231553 - 2¹ = 231551 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (19).

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 231553.

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 7 ways as a sum of consecutive naturals, for example, 738 + ... + 1003.

It is an arithmetic number, because the mean of its divisors is an integer number (34840).

2²³¹⁵⁵³ is an apocalyptic number.

It is an amenable number.

231553 is a deficient number, since it is larger than the sum of its proper divisors (47167).

231553 is a wasteful number, since it uses less digits than its factorization.

231553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1767.

The product of its digits is 450, while the sum is 19.

The square root of 231553 is about 481.1995428094. The cubic root of 231553 is about 61.4068477616.

Adding to 231553 its reverse (355132), we get a palindrome (586685).

It can be divided in two parts, 231 and 553, that added together give a square (784 = 28²).

The spelling of 231553 in words is "two hundred thirty-one thousand, five hundred fifty-three".