538305257 has 4 divisors (see below), whose sum is σ = 615206016. Its totient is φ = 461404500.

The previous prime is 538305239. The next prime is 538305281. The reversal of 538305257 is 752503835.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 538305257 - 2¹⁸ = 538043113 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 538305257.

It is not an unprimeable number, because it can be changed into a prime (538305217) 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 in 3 ways as a sum of consecutive naturals, for example, 38450369 + ... + 38450382.

It is an arithmetic number, because the mean of its divisors is an integer number (153801504).

Almost surely, 2^538305257 is an apocalyptic number.

It is an amenable number.

538305257 is a deficient number, since it is larger than the sum of its proper divisors (76900759).

538305257 is an equidigital number, since it uses as much as digits as its factorization.

538305257 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76900758.

The product of its (nonzero) digits is 126000, while the sum is 38.

The square root of 538305257 is about 23201.4063582361. The cubic root of 538305257 is about 813.4724958770.

The spelling of 538305257 in words is "five hundred thirty-eight million, three hundred five thousand, two hundred fifty-seven".