31155671047 has 2 divisors, whose sum is σ = 31155671048. Its totient is φ = 31155671046.

The previous prime is 31155671003. The next prime is 31155671051. The reversal of 31155671047 is 74017655113.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-31155671047 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31155671077) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15577835523 + 15577835524.

It is an arithmetic number, because the mean of its divisors is an integer number (15577835524).

Almost surely, 2^31155671047 is an apocalyptic number.

31155671047 is a deficient number, since it is larger than the sum of its proper divisors (1).

31155671047 is an equidigital number, since it uses as much as digits as its factorization.

31155671047 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 88200, while the sum is 40.

The spelling of 31155671047 in words is "thirty-one billion, one hundred fifty-five million, six hundred seventy-one thousand, forty-seven".