31230243641 has 2 divisors, whose sum is σ = 31230243642. Its totient is φ = 31230243640.

The previous prime is 31230243631. The next prime is 31230243713. The reversal of 31230243641 is 14634203213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 28706186041 + 2524057600 = 169429^2 + 50240^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31230243641 is a prime.

It is not a weakly prime, because it can be changed into another prime (31230243631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615121820 + 15615121821.

It is an arithmetic number, because the mean of its divisors is an integer number (15615121821).

Almost surely, 2^31230243641 is an apocalyptic number.

It is an amenable number.

31230243641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230243641 is an equidigital number, since it uses as much as digits as its factorization.

31230243641 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10368, while the sum is 29.

Adding to 31230243641 its reverse (14634203213), we get a palindrome (45864446854).

The spelling of 31230243641 in words is "thirty-one billion, two hundred thirty million, two hundred forty-three thousand, six hundred forty-one".