65231 has 8 divisors (see below), whose sum is σ = 70224. Its totient is φ = 60480.

The previous prime is 65213. The next prime is 65239. The reversal of 65231 is 13256.

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 65231 - 2⁶ = 65167 is a prime.

It is a super-2 number, since 2×65231² = 8510166722, which contains 22 as substring.

It is an Ulam number.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (65239) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1496 + ... + 1538.

It is an arithmetic number, because the mean of its divisors is an integer number (8778).

2⁶⁵²³¹ is an apocalyptic number.

65231 is a deficient number, since it is larger than the sum of its proper divisors (4993).

65231 is a wasteful number, since it uses less digits than its factorization.

65231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 121.

The product of its digits is 180, while the sum is 17.

The square root of 65231 is about 255.4036021672. The cubic root of 65231 is about 40.2548314095.

Adding to 65231 its reverse (13256), we get a palindrome (78487).

The spelling of 65231 in words is "sixty-five thousand, two hundred thirty-one".