520213543 has 2 divisors, whose sum is σ = 520213544. Its totient is φ = 520213542.

The previous prime is 520213487. The next prime is 520213553. The reversal of 520213543 is 345312025.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520213543 is a prime.

It is a super-2 number, since 2×520213543² = 541244260641225698, which contains 22 as substring.

It is equal to p_27363310 and since 520213543 and 27363310 have the same sum of digits, it is a Honaker prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520213553) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260106771 + 260106772.

It is an arithmetic number, because the mean of its divisors is an integer number (260106772).

Almost surely, 2^520213543 is an apocalyptic number.

520213543 is a deficient number, since it is larger than the sum of its proper divisors (1).

520213543 is an equidigital number, since it uses as much as digits as its factorization.

520213543 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 3600, while the sum is 25.

The square root of 520213543 is about 22808.1902613951. The cubic root of 520213543 is about 804.2552132995.

Adding to 520213543 its reverse (345312025), we get a palindrome (865525568).

The spelling of 520213543 in words is "five hundred twenty million, two hundred thirteen thousand, five hundred forty-three".