636231 has 16 divisors (see below), whose sum is σ = 898560. Its totient is φ = 399840.

The previous prime is 636217. The next prime is 636241. The reversal of 636231 is 132636.

It is not a de Polignac number, because 636231 - 2¹⁰ = 635207 is a prime.

It is a super-2 number, since 2×636231² = 809579770722, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636198 and 636207.

It is a congruent number.

It is an inconsummate number, since it does not exist a number n which divided by its sum of digits gives 636231.

It is not an unprimeable number, because it can be changed into a prime (636211) 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, 6126 + ... + 6228.

It is an arithmetic number, because the mean of its divisors is an integer number (56160).

2⁶³⁶²³¹ is an apocalyptic number.

636231 is a deficient number, since it is larger than the sum of its proper divisors (262329).

636231 is a wasteful number, since it uses less digits than its factorization.

636231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 206.

The product of its digits is 648, while the sum is 21.

The square root of 636231 is about 797.6408966446. The cubic root of 636231 is about 86.0078864230.

Adding to 636231 its reverse (132636), we get a palindrome (768867).

The spelling of 636231 in words is "six hundred thirty-six thousand, two hundred thirty-one".