513231166543 has 2 divisors, whose sum is σ = 513231166544. Its totient is φ = 513231166542.

The previous prime is 513231166517. The next prime is 513231166549. The reversal of 513231166543 is 345661132315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 513231166543 - 2⁹ = 513231166031 is a prime.

It is a super-2 number, since 2×513231166543² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 513231166496 and 513231166505.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (513231166549) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256615583271 + 256615583272.

It is an arithmetic number, because the mean of its divisors is an integer number (256615583272).

Almost surely, 2^513231166543 is an apocalyptic number.

513231166543 is a deficient number, since it is larger than the sum of its proper divisors (1).

513231166543 is an equidigital number, since it uses as much as digits as its factorization.

513231166543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 194400, while the sum is 40.

Adding to 513231166543 its reverse (345661132315), we get a palindrome (858892298858).

The spelling of 513231166543 in words is "five hundred thirteen billion, two hundred thirty-one million, one hundred sixty-six thousand, five hundred forty-three".