531155 has 8 divisors (see below), whose sum is σ = 653184. Its totient is φ = 414400.

The previous prime is 531143. The next prime is 531163. The reversal of 531155 is 551135.

It is a happy number.

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

It is a de Polignac number, because none of the positive numbers 2^k-531155 is a prime.

It is a Duffinian number.

It is a nialpdrome in base 9.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1091 + ... + 1500.

It is an arithmetic number, because the mean of its divisors is an integer number (81648).

2⁵³¹¹⁵⁵ is an apocalyptic number.

531155 is a deficient number, since it is larger than the sum of its proper divisors (122029).

531155 is a wasteful number, since it uses less digits than its factorization.

531155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2637.

The product of its digits is 375, while the sum is 20.

The square root of 531155 is about 728.8038144796. The cubic root of 531155 is about 80.9854670873.

Subtracting from 531155 its sum of digits (20), we obtain a palindrome (531135).

It can be divided in two parts, 531 and 155, that added together give a palindrome (686).

The spelling of 531155 in words is "five hundred thirty-one thousand, one hundred fifty-five".