31524523006643 has 2 divisors, whose sum is σ = 31524523006644. Its totient is φ = 31524523006642.

The previous prime is 31524523006553. The next prime is 31524523006667. The reversal of 31524523006643 is 34660032542513.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31524523006643 - 2¹² = 31524523002547 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31524523006594 and 31524523006603.

It is not a weakly prime, because it can be changed into another prime (31524523006673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15762261503321 + 15762261503322.

It is an arithmetic number, because the mean of its divisors is an integer number (15762261503322).

Almost surely, 2^{31524523006643} is an apocalyptic number.

31524523006643 is a deficient number, since it is larger than the sum of its proper divisors (1).

31524523006643 is an equidigital number, since it uses as much as digits as its factorization.

31524523006643 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 44.

The spelling of 31524523006643 in words is "thirty-one trillion, five hundred twenty-four billion, five hundred twenty-three million, six thousand, six hundred forty-three".