231116636 has 12 divisors (see below), whose sum is σ = 405330912. Its totient is φ = 115307808.

The previous prime is 231116621. The next prime is 231116663. The reversal of 231116636 is 636611132.

231116636 = T₁₉₁ + T₁₉₂ + ... + T₁₁₁₆.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 231116599 and 231116608.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 60545 + ... + 64248.

It is an arithmetic number, because the mean of its divisors is an integer number (33777576).

Almost surely, 2^231116636 is an apocalyptic number.

It is an amenable number.

231116636 is a deficient number, since it is larger than the sum of its proper divisors (174214276).

231116636 is a wasteful number, since it uses less digits than its factorization.

231116636 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 125260 (or 125258 counting only the distinct ones).

The product of its digits is 3888, while the sum is 29.

The square root of 231116636 is about 15202.5207120398. The cubic root of 231116636 is about 613.6824956072.

Adding to 231116636 its reverse (636611132), we get a palindrome (867727768).

The spelling of 231116636 in words is "two hundred thirty-one million, one hundred sixteen thousand, six hundred thirty-six".