616231 has 16 divisors (see below), whose sum is σ = 787968. Its totient is φ = 468000.

The previous prime is 616229. The next prime is 616243. The reversal of 616231 is 132616.

It is a cyclic number.

It is not a de Polignac number, because 616231 - 2¹ = 616229 is a prime.

It is a super-2 number, since 2×616231² = 759481290722, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 616199 and 616208.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (616211) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4006 + ... + 4156.

It is an arithmetic number, because the mean of its divisors is an integer number (49248).

2⁶¹⁶²³¹ is an apocalyptic number.

616231 is a deficient number, since it is larger than the sum of its proper divisors (171737).

616231 is a wasteful number, since it uses less digits than its factorization.

With its predecessor (616230) it forms an eRAP, since the sums of their prime factors are consecutive (221 and 222).

616231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 222.

The product of its digits is 216, while the sum is 19.

The square root of 616231 is about 785.0038216467. The cubic root of 616231 is about 85.0970517753.

Adding to 616231 its reverse (132616), we get a palindrome (748847).

The spelling of 616231 in words is "six hundred sixteen thousand, two hundred thirty-one".