31320272647 has 2 divisors, whose sum is σ = 31320272648. Its totient is φ = 31320272646.

The previous prime is 31320272593. The next prime is 31320272723. The reversal of 31320272647 is 74627202313.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 31320272647 - 2¹⁵ = 31320239879 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31320272047) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15660136323 + 15660136324.

It is an arithmetic number, because the mean of its divisors is an integer number (15660136324).

Almost surely, 2^31320272647 is an apocalyptic number.

31320272647 is a deficient number, since it is larger than the sum of its proper divisors (1).

31320272647 is an equidigital number, since it uses as much as digits as its factorization.

31320272647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 84672, while the sum is 37.

The spelling of 31320272647 in words is "thirty-one billion, three hundred twenty million, two hundred seventy-two thousand, six hundred forty-seven".