653231 has 4 divisors (see below), whose sum is σ = 655632. Its totient is φ = 650832.

The previous prime is 653209. The next prime is 653243. The reversal of 653231 is 132356.

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

It is a cyclic number.

It is not a de Polignac number, because 653231 - 2¹⁰ = 652207 is a prime.

It is a super-2 number, since 2×653231² = 853421478722, 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 (653281) 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, 731 + ... + 1356.

It is an arithmetic number, because the mean of its divisors is an integer number (163908).

2⁶⁵³²³¹ is an apocalyptic number.

653231 is a deficient number, since it is larger than the sum of its proper divisors (2401).

653231 is a wasteful number, since it uses less digits than its factorization.

653231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2400.

The product of its digits is 540, while the sum is 20.

The square root of 653231 is about 808.2270720534. The cubic root of 653231 is about 86.7672025283.

Adding to 653231 its reverse (132356), we get a palindrome (785587).

The spelling of 653231 in words is "six hundred fifty-three thousand, two hundred thirty-one".