520242101 has 2 divisors, whose sum is σ = 520242102. Its totient is φ = 520242100.

The previous prime is 520242061. The next prime is 520242161. The reversal of 520242101 is 101242025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 498628900 + 21613201 = 22330^2 + 4649^2 .

It is a cyclic number.

It is not a de Polignac number, because 520242101 - 2²² = 516047797 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 520242101.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520242161) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260121050 + 260121051.

It is an arithmetic number, because the mean of its divisors is an integer number (260121051).

Almost surely, 2^520242101 is an apocalyptic number.

It is an amenable number.

520242101 is a deficient number, since it is larger than the sum of its proper divisors (1).

520242101 is an equidigital number, since it uses as much as digits as its factorization.

520242101 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 160, while the sum is 17.

The square root of 520242101 is about 22808.8162998434. The cubic root of 520242101 is about 804.2699300124.

Adding to 520242101 its reverse (101242025), we get a palindrome (621484126).

The spelling of 520242101 in words is "five hundred twenty million, two hundred forty-two thousand, one hundred one".