513231223109609 has 2 divisors, whose sum is σ = 513231223109610. Its totient is φ = 513231223109608.

The previous prime is 513231223109569. The next prime is 513231223109651. The reversal of 513231223109609 is 906901322132315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 344055755587600 + 169175467522009 = 18548740^2 + 13006747^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-513231223109609 is a prime.

It is not a weakly prime, because it can be changed into another prime (513231223103609) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256615611554804 + 256615611554805.

It is an arithmetic number, because the mean of its divisors is an integer number (256615611554805).

Almost surely, 2^{513231223109609} is an apocalyptic number.

It is an amenable number.

513231223109609 is a deficient number, since it is larger than the sum of its proper divisors (1).

513231223109609 is an equidigital number, since it uses as much as digits as its factorization.

513231223109609 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 524880, while the sum is 47.

The spelling of 513231223109609 in words is "five hundred thirteen trillion, two hundred thirty-one billion, two hundred twenty-three million, one hundred nine thousand, six hundred nine".