636341231 has 4 divisors (see below), whose sum is σ = 636406512. Its totient is φ = 636275952.

The previous prime is 636341227. The next prime is 636341239. The reversal of 636341231 is 132143636.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It is a cyclic number.

It is not a de Polignac number, because 636341231 - 2² = 636341227 is a prime.

It is a super-2 number, since 2×636341231² = 809860324541190722, 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 = 636341194 and 636341203.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636341239) 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, 14750 + ... + 38603.

It is an arithmetic number, because the mean of its divisors is an integer number (159101628).

Almost surely, 2^636341231 is an apocalyptic number.

636341231 is a deficient number, since it is larger than the sum of its proper divisors (65281).

636341231 is a wasteful number, since it uses less digits than its factorization.

636341231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65280.

The product of its digits is 7776, while the sum is 29.

The square root of 636341231 is about 25225.8048632744. The cubic root of 636341231 is about 860.1285327089.

Adding to 636341231 its reverse (132143636), we get a palindrome (768484867).

The spelling of 636341231 in words is "six hundred thirty-six million, three hundred forty-one thousand, two hundred thirty-one".