521542297 has 2 divisors, whose sum is σ = 521542298. Its totient is φ = 521542296.

The previous prime is 521542283. The next prime is 521542349. The reversal of 521542297 is 792245125.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 279926361 + 241615936 = 16731^2 + 15544^2 .

It is a cyclic number.

It is not a de Polignac number, because 521542297 - 2²⁷ = 387324569 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521542237) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260771148 + 260771149.

It is an arithmetic number, because the mean of its divisors is an integer number (260771149).

Almost surely, 2^521542297 is an apocalyptic number.

It is an amenable number.

521542297 is a deficient number, since it is larger than the sum of its proper divisors (1).

521542297 is an equidigital number, since it uses as much as digits as its factorization.

521542297 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 50400, while the sum is 37.

The square root of 521542297 is about 22837.3005628949. The cubic root of 521542297 is about 804.9393866634.

The spelling of 521542297 in words is "five hundred twenty-one million, five hundred forty-two thousand, two hundred ninety-seven".