31285060691 has 2 divisors, whose sum is σ = 31285060692. Its totient is φ = 31285060690.

The previous prime is 31285060661. The next prime is 31285060711. The reversal of 31285060691 is 19606058213.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 31285060691 - 2⁶ = 31285060627 is a prime.

It is not a weakly prime, because it can be changed into another prime (31285060661) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15642530345 + 15642530346.

It is an arithmetic number, because the mean of its divisors is an integer number (15642530346).

Almost surely, 2^31285060691 is an apocalyptic number.

31285060691 is a deficient number, since it is larger than the sum of its proper divisors (1).

31285060691 is an equidigital number, since it uses as much as digits as its factorization.

31285060691 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 77760, while the sum is 41.

The spelling of 31285060691 in words is "thirty-one billion, two hundred eighty-five million, sixty thousand, six hundred ninety-one".