31545024997 has 2 divisors, whose sum is σ = 31545024998. Its totient is φ = 31545024996.

The previous prime is 31545024989. The next prime is 31545025051. The reversal of 31545024997 is 79942054513.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 23987504641 + 7557520356 = 154879^2 + 86934^2 .

It is an emirp because it is prime and its reverse (79942054513) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 31545024997 - 2³ = 31545024989 is a prime.

It is a super-2 number, since 2×31545024997² (a number of 22 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 31545024997.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31546024997) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15772512498 + 15772512499.

It is an arithmetic number, because the mean of its divisors is an integer number (15772512499).

Almost surely, 2^31545024997 is an apocalyptic number.

It is an amenable number.

31545024997 is a deficient number, since it is larger than the sum of its proper divisors (1).

31545024997 is an equidigital number, since it uses as much as digits as its factorization.

31545024997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1360800, while the sum is 49.

The spelling of 31545024997 in words is "thirty-one billion, five hundred forty-five million, twenty-four thousand, nine hundred ninety-seven".