31545024989 has 2 divisors, whose sum is σ = 31545024990. Its totient is φ = 31545024988.

The previous prime is 31545024941. The next prime is 31545024997. The reversal of 31545024989 is 98942054513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 31521161764 + 23863225 = 177542^2 + 4885^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31545024989 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31545020989) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15772512494 + 15772512495.

It is an arithmetic number, because the mean of its divisors is an integer number (15772512495).

Almost surely, 2^31545024989 is an apocalyptic number.

It is an amenable number.

31545024989 is a deficient number, since it is larger than the sum of its proper divisors (1).

31545024989 is an equidigital number, since it uses as much as digits as its factorization.

31545024989 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1555200, while the sum is 50.

The spelling of 31545024989 in words is "thirty-one billion, five hundred forty-five million, twenty-four thousand, nine hundred eighty-nine".