31233404641 has 4 divisors (see below), whose sum is σ = 31233802500. Its totient is φ = 31233006784.

The previous prime is 31233404639. The next prime is 31233404663. The reversal of 31233404641 is 14640433213.

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 can be written as a sum of positive squares in 2 ways, for example, as 30300713041 + 932691600 = 174071^2 + 30540^2 .

It is a cyclic number.

It is not a de Polignac number, because 31233404641 - 2¹ = 31233404639 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (31233404681) 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, 37516 + ... + 252733.

It is an arithmetic number, because the mean of its divisors is an integer number (7808450625).

Almost surely, 2^31233404641 is an apocalyptic number.

It is an amenable number.

31233404641 is a deficient number, since it is larger than the sum of its proper divisors (397859).

31233404641 is a wasteful number, since it uses less digits than its factorization.

31233404641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 397858.

The product of its (nonzero) digits is 20736, while the sum is 31.

Adding to 31233404641 its reverse (14640433213), we get a palindrome (45873837854).

The spelling of 31233404641 in words is "thirty-one billion, two hundred thirty-three million, four hundred four thousand, six hundred forty-one".