231042636 has 72 divisors (see below), whose sum is σ = 664844544. Its totient is φ = 66966240.

The previous prime is 231042611. The next prime is 231042671. The reversal of 231042636 is 636240132.

231042636 is a `hidden beast` number, since 23 + 1 + 0 + 4 + 2 + 636 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3576 + ... + 21791.

It is an arithmetic number, because the mean of its divisors is an integer number (9233952).

Almost surely, 2^231042636 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 231042636, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (332422272).

231042636 is an abundant number, since it is smaller than the sum of its proper divisors (433801908).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

231042636 is a wasteful number, since it uses less digits than its factorization.

231042636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25411 (or 25406 counting only the distinct ones).

The product of its (nonzero) digits is 5184, while the sum is 27.

The square root of 231042636 is about 15200.0867102790. The cubic root of 231042636 is about 613.6169913765.

Adding to 231042636 its reverse (636240132), we get a palindrome (867282768).

The spelling of 231042636 in words is "two hundred thirty-one million, forty-two thousand, six hundred thirty-six".