31422710857 has 2 divisors, whose sum is σ = 31422710858. Its totient is φ = 31422710856.

The previous prime is 31422710783. The next prime is 31422710887. The reversal of 31422710857 is 75801722413.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 20875626256 + 10547084601 = 144484^2 + 102699^2 .

It is a cyclic number.

It is not a de Polignac number, because 31422710857 - 2¹¹ = 31422708809 is a prime.

It is not a weakly prime, because it can be changed into another prime (31422710887) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15711355428 + 15711355429.

It is an arithmetic number, because the mean of its divisors is an integer number (15711355429).

Almost surely, 2^31422710857 is an apocalyptic number.

It is an amenable number.

31422710857 is a deficient number, since it is larger than the sum of its proper divisors (1).

31422710857 is an equidigital number, since it uses as much as digits as its factorization.

31422710857 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 94080, while the sum is 40.

The spelling of 31422710857 in words is "thirty-one billion, four hundred twenty-two million, seven hundred ten thousand, eight hundred fifty-seven".