31290523469 has 2 divisors, whose sum is σ = 31290523470. Its totient is φ = 31290523468.

The previous prime is 31290523447. The next prime is 31290523531. The reversal of 31290523469 is 96432509213.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18114468100 + 13176055369 = 134590^2 + 114787^2 .

It is a cyclic number.

It is not a de Polignac number, because 31290523469 - 2¹² = 31290519373 is a prime.

It is a super-2 number, since 2×31290523469² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (31290523769) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 15645261734 + 15645261735.

It is an arithmetic number, because the mean of its divisors is an integer number (15645261735).

Almost surely, 2^31290523469 is an apocalyptic number.

It is an amenable number.

31290523469 is a deficient number, since it is larger than the sum of its proper divisors (1).

31290523469 is an equidigital number, since it uses as much as digits as its factorization.

31290523469 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 349920, while the sum is 44.

The spelling of 31290523469 in words is "thirty-one billion, two hundred ninety million, five hundred twenty-three thousand, four hundred sixty-nine".