31230320047 has 2 divisors, whose sum is σ = 31230320048. Its totient is φ = 31230320046.

The previous prime is 31230319957. The next prime is 31230320057. The reversal of 31230320047 is 74002303213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31230320047 - 2³¹ = 29082836399 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31230320057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15615160023 + 15615160024.

It is an arithmetic number, because the mean of its divisors is an integer number (15615160024).

Almost surely, 2^31230320047 is an apocalyptic number.

31230320047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31230320047 is an equidigital number, since it uses as much as digits as its factorization.

31230320047 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3024, while the sum is 25.

The spelling of 31230320047 in words is "thirty-one billion, two hundred thirty million, three hundred twenty thousand, forty-seven".