520369261 has 2 divisors, whose sum is σ = 520369262. Its totient is φ = 520369260.

The previous prime is 520369259. The next prime is 520369309. The reversal of 520369261 is 162963025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 517790025 + 2579236 = 22755^2 + 1606^2 .

It is a cyclic number.

It is not a de Polignac number, because 520369261 - 2¹ = 520369259 is a prime.

It is a super-2 number, since 2×520369261² = 541568335587372242, which contains 22 as substring.

Together with 520369259, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (520369061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260184630 + 260184631.

It is an arithmetic number, because the mean of its divisors is an integer number (260184631).

Almost surely, 2^520369261 is an apocalyptic number.

It is an amenable number.

520369261 is a deficient number, since it is larger than the sum of its proper divisors (1).

520369261 is an equidigital number, since it uses as much as digits as its factorization.

520369261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 19440, while the sum is 34.

The square root of 520369261 is about 22811.6036481436. The cubic root of 520369261 is about 804.3354524763.

The spelling of 520369261 in words is "five hundred twenty million, three hundred sixty-nine thousand, two hundred sixty-one".