231056340644 has 6 divisors (see below), whose sum is σ = 404348596134. Its totient is φ = 115528170320.

The previous prime is 231056340637. The next prime is 231056340649. The reversal of 231056340644 is 446043650132.

It can be written as a sum of positive squares in only one way, i.e., 126656268544 + 104400072100 = 355888^2 + 323110^2 .

It is a junction number, because it is equal to n+sod(n) for n = 231056340598 and 231056340607.

It is not an unprimeable number, because it can be changed into a prime (231056340649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 28882042577 + ... + 28882042584.

It is an arithmetic number, because the mean of its divisors is an integer number (67391432689).

Almost surely, 2^231056340644 is an apocalyptic number.

It is an amenable number.

231056340644 is a deficient number, since it is larger than the sum of its proper divisors (173292255490).

231056340644 is a wasteful number, since it uses less digits than its factorization.

231056340644 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57764085165 (or 57764085163 counting only the distinct ones).

The product of its (nonzero) digits is 207360, while the sum is 38.

Adding to 231056340644 its reverse (446043650132), we get a palindrome (677099990776).

The spelling of 231056340644 in words is "two hundred thirty-one billion, fifty-six million, three hundred forty thousand, six hundred forty-four".