513231203249 has 2 divisors, whose sum is σ = 513231203250. Its totient is φ = 513231203248.

The previous prime is 513231203231. The next prime is 513231203357. The reversal of 513231203249 is 942302132315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 326261443249 + 186969760000 = 571193^2 + 432400^2 .

It is a cyclic number.

It is not a de Polignac number, because 513231203249 - 2²⁴ = 513214426033 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (513231202249) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256615601624 + 256615601625.

It is an arithmetic number, because the mean of its divisors is an integer number (256615601625).

Almost surely, 2^513231203249 is an apocalyptic number.

It is an amenable number.

513231203249 is a deficient number, since it is larger than the sum of its proper divisors (1).

513231203249 is an equidigital number, since it uses as much as digits as its factorization.

513231203249 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 513231203249 in words is "five hundred thirteen billion, two hundred thirty-one million, two hundred three thousand, two hundred forty-nine".