31425541117 has 2 divisors, whose sum is σ = 31425541118. Its totient is φ = 31425541116.

The previous prime is 31425541087. The next prime is 31425541127. The reversal of 31425541117 is 71114552413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 30839223321 + 586317796 = 175611^2 + 24214^2 .

It is a cyclic number.

It is not a de Polignac number, because 31425541117 - 2¹¹ = 31425539069 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31425541127) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15712770558 + 15712770559.

It is an arithmetic number, because the mean of its divisors is an integer number (15712770559).

Almost surely, 2^31425541117 is an apocalyptic number.

It is an amenable number.

31425541117 is a deficient number, since it is larger than the sum of its proper divisors (1).

31425541117 is an equidigital number, since it uses as much as digits as its factorization.

31425541117 is an evil number, because the sum of its binary digits is even.

The product of its digits is 16800, while the sum is 34.

The spelling of 31425541117 in words is "thirty-one billion, four hundred twenty-five million, five hundred forty-one thousand, one hundred seventeen".