31506730441 has 2 divisors, whose sum is σ = 31506730442. Its totient is φ = 31506730440.

The previous prime is 31506730351. The next prime is 31506730471. The reversal of 31506730441 is 14403760513.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 29211937225 + 2294793216 = 170915^2 + 47904^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31506730441 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31506730397 and 31506730406.

It is not a weakly prime, because it can be changed into another prime (31506730471) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15753365220 + 15753365221.

It is an arithmetic number, because the mean of its divisors is an integer number (15753365221).

Almost surely, 2^31506730441 is an apocalyptic number.

It is an amenable number.

31506730441 is a deficient number, since it is larger than the sum of its proper divisors (1).

31506730441 is an equidigital number, since it uses as much as digits as its factorization.

31506730441 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 30240, while the sum is 34.

The spelling of 31506730441 in words is "thirty-one billion, five hundred six million, seven hundred thirty thousand, four hundred forty-one".