512320261 has 2 divisors, whose sum is σ = 512320262. Its totient is φ = 512320260.

The previous prime is 512320253. The next prime is 512320271. The reversal of 512320261 is 162023215.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 420045025 + 92275236 = 20495^2 + 9606^2 .

It is a cyclic number.

It is not a de Polignac number, because 512320261 - 2³ = 512320253 is a prime.

It is a super-2 number, since 2×512320261² = 524944099662216242, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (512320201) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 256160130 + 256160131.

It is an arithmetic number, because the mean of its divisors is an integer number (256160131).

Almost surely, 2^512320261 is an apocalyptic number.

It is an amenable number.

512320261 is a deficient number, since it is larger than the sum of its proper divisors (1).

512320261 is an equidigital number, since it uses as much as digits as its factorization.

512320261 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 512320261 is about 22634.4927268097. The cubic root of 512320261 is about 800.1667678374.

Adding to 512320261 its reverse (162023215), we get a palindrome (674343476).

The spelling of 512320261 in words is "five hundred twelve million, three hundred twenty thousand, two hundred sixty-one".