1023204515513 has 2 divisors, whose sum is σ = 1023204515514. Its totient is φ = 1023204515512.

The previous prime is 1023204515393. The next prime is 1023204515629. The reversal of 1023204515513 is 3155154023201.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 965320005049 + 57884510464 = 982507^2 + 240592^2 .

It is an emirp because it is prime and its reverse (3155154023201) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1023204515513 - 2²⁴ = 1023187738297 is a prime.

It is a Sophie Germain prime.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 1023204515513.

It is not a weakly prime, because it can be changed into another prime (1023204514513) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 511602257756 + 511602257757.

It is an arithmetic number, because the mean of its divisors is an integer number (511602257757).

Almost surely, 2^{1023204515513} is an apocalyptic number.

It is an amenable number.

1023204515513 is a deficient number, since it is larger than the sum of its proper divisors (1).

1023204515513 is an equidigital number, since it uses as much as digits as its factorization.

1023204515513 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 18000, while the sum is 32.

Adding to 1023204515513 its reverse (3155154023201), we get a palindrome (4178358538714).

The spelling of 1023204515513 in words is "one trillion, twenty-three billion, two hundred four million, five hundred fifteen thousand, five hundred thirteen".