31244859641 has 2 divisors, whose sum is σ = 31244859642. Its totient is φ = 31244859640.

The previous prime is 31244859631. The next prime is 31244859647. The reversal of 31244859641 is 14695844213.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 24592826041 + 6652033600 = 156821^2 + 81560^2 .

It is an emirp because it is prime and its reverse (14695844213) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31244859641 - 2⁶ = 31244859577 is a prime.

It is not a weakly prime, because it can be changed into another prime (31244859647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15622429820 + 15622429821.

It is an arithmetic number, because the mean of its divisors is an integer number (15622429821).

Almost surely, 2^31244859641 is an apocalyptic number.

It is an amenable number.

31244859641 is a deficient number, since it is larger than the sum of its proper divisors (1).

31244859641 is an equidigital number, since it uses as much as digits as its factorization.

31244859641 is an evil number, because the sum of its binary digits is even.

The product of its digits is 829440, while the sum is 47.

The spelling of 31244859641 in words is "thirty-one billion, two hundred forty-four million, eight hundred fifty-nine thousand, six hundred forty-one".