513217443449 has 2 divisors, whose sum is σ = 513217443450. Its totient is φ = 513217443448.

The previous prime is 513217443437. The next prime is 513217443533. The reversal of 513217443449 is 944344712315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 480932541049 + 32284902400 = 693493^2 + 179680^2 .

It is a cyclic number.

It is not a de Polignac number, because 513217443449 - 2⁴ = 513217443433 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 (513217463449) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256608721724 + 256608721725.

It is an arithmetic number, because the mean of its divisors is an integer number (256608721725).

Almost surely, 2^513217443449 is an apocalyptic number.

It is an amenable number.

513217443449 is a deficient number, since it is larger than the sum of its proper divisors (1).

513217443449 is an equidigital number, since it uses as much as digits as its factorization.

513217443449 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1451520, while the sum is 47.

The spelling of 513217443449 in words is "five hundred thirteen billion, two hundred seventeen million, four hundred forty-three thousand, four hundred forty-nine".