611231 has 4 divisors (see below), whose sum is σ = 614592. Its totient is φ = 607872.

The previous prime is 611213. The next prime is 611257. The reversal of 611231 is 132116.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-611231 is a prime.

It is a super-2 number, since 2×611231² = 747206670722, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (611131) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1391 + ... + 1776.

It is an arithmetic number, because the mean of its divisors is an integer number (153648).

2⁶¹¹²³¹ is an apocalyptic number.

611231 is a deficient number, since it is larger than the sum of its proper divisors (3361).

611231 is a wasteful number, since it uses less digits than its factorization.

611231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3360.

The product of its digits is 36, while the sum is 14.

The square root of 611231 is about 781.8126374011. The cubic root of 611231 is about 84.8662718418.

Adding to 611231 its reverse (132116), we get a palindrome (743347).

It can be divided in two parts, 611 and 231, that multiplied together give a palindrome (141141).

The spelling of 611231 in words is "six hundred eleven thousand, two hundred thirty-one".