31305732047 has 2 divisors, whose sum is σ = 31305732048. Its totient is φ = 31305732046.

The previous prime is 31305732037. The next prime is 31305732053. The reversal of 31305732047 is 74023750313.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31305732047 - 2²⁶ = 31238623183 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 31305731998 and 31305732016.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31305732037) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15652866023 + 15652866024.

It is an arithmetic number, because the mean of its divisors is an integer number (15652866024).

Almost surely, 2^31305732047 is an apocalyptic number.

31305732047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31305732047 is an equidigital number, since it uses as much as digits as its factorization.

31305732047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 52920, while the sum is 35.

The spelling of 31305732047 in words is "thirty-one billion, three hundred five million, seven hundred thirty-two thousand, forty-seven".