520600243 has 2 divisors, whose sum is σ = 520600244. Its totient is φ = 520600242.

The previous prime is 520600217. The next prime is 520600253. The reversal of 520600243 is 342006025.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-520600243 is a prime.

It is a super-2 number, since 2×520600243² = 542049226023318098, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (520600253) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260300121 + 260300122.

It is an arithmetic number, because the mean of its divisors is an integer number (260300122).

Almost surely, 2^520600243 is an apocalyptic number.

520600243 is a deficient number, since it is larger than the sum of its proper divisors (1).

520600243 is an equidigital number, since it uses as much as digits as its factorization.

520600243 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1440, while the sum is 22.

The square root of 520600243 is about 22816.6659045532. The cubic root of 520600243 is about 804.4544445992.

Adding to 520600243 its reverse (342006025), we get a palindrome (862606268).

The spelling of 520600243 in words is "five hundred twenty million, six hundred thousand, two hundred forty-three".