520238321 has 2 divisors, whose sum is σ = 520238322. Its totient is φ = 520238320.

The previous prime is 520238291. The next prime is 520238419. The reversal of 520238321 is 123832025.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 476941921 + 43296400 = 21839^2 + 6580^2 .

It is a cyclic number.

It is not a de Polignac number, because 520238321 - 2²² = 516044017 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (520238821) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260119160 + 260119161.

It is an arithmetic number, because the mean of its divisors is an integer number (260119161).

Almost surely, 2^520238321 is an apocalyptic number.

It is an amenable number.

520238321 is a deficient number, since it is larger than the sum of its proper divisors (1).

520238321 is an equidigital number, since it uses as much as digits as its factorization.

520238321 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2880, while the sum is 26.

The square root of 520238321 is about 22808.7334369973. The cubic root of 520238321 is about 804.2679821067.

The spelling of 520238321 in words is "five hundred twenty million, two hundred thirty-eight thousand, three hundred twenty-one".