231026644 has 12 divisors (see below), whose sum is σ = 418238100. Its totient is φ = 111530048.

The previous prime is 231026641. The next prime is 231026647. The reversal of 231026644 is 446620132.

231026644 is digitally balanced in base 3 and base 9, because in such bases it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (231026641) and next prime (231026647).

It can be written as a sum of positive squares in 2 ways, for example, as 173448900 + 57577744 = 13170^2 + 7588^2 .

231026644 is strictly pandigital in base 9.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (231026641) 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, 995689 + ... + 995920.

It is an arithmetic number, because the mean of its divisors is an integer number (34853175).

Almost surely, 2^231026644 is an apocalyptic number.

It is an amenable number.

231026644 is a deficient number, since it is larger than the sum of its proper divisors (187211456).

231026644 is a wasteful number, since it uses less digits than its factorization.

231026644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1991642 (or 1991640 counting only the distinct ones).

The product of its (nonzero) digits is 6912, while the sum is 28.

The square root of 231026644 is about 15199.5606515452. The cubic root of 231026644 is about 613.6028335432.

Adding to 231026644 its reverse (446620132), we get a palindrome (677646776).

The spelling of 231026644 in words is "two hundred thirty-one million, twenty-six thousand, six hundred forty-four".