31656287041 has 2 divisors, whose sum is σ = 31656287042. Its totient is φ = 31656287040.

The previous prime is 31656287023. The next prime is 31656287057. The reversal of 31656287041 is 14078265613.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 18199359025 + 13456928016 = 134905^2 + 116004^2 .

It is a cyclic number.

It is not a de Polignac number, because 31656287041 - 2⁵ = 31656287009 is a prime.

It is not a weakly prime, because it can be changed into another prime (31656287021) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15828143520 + 15828143521.

It is an arithmetic number, because the mean of its divisors is an integer number (15828143521).

Almost surely, 2^31656287041 is an apocalyptic number.

It is an amenable number.

31656287041 is a deficient number, since it is larger than the sum of its proper divisors (1).

31656287041 is an equidigital number, since it uses as much as digits as its factorization.

31656287041 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 241920, while the sum is 43.

The spelling of 31656287041 in words is "thirty-one billion, six hundred fifty-six million, two hundred eighty-seven thousand, forty-one".