521113459 has 2 divisors, whose sum is σ = 521113460. Its totient is φ = 521113458.

The previous prime is 521113421. The next prime is 521113519. The reversal of 521113459 is 954311125.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521113459 - 2²⁷ = 386895731 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521113459.

It is not a weakly prime, because it can be changed into another prime (521113559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260556729 + 260556730.

It is an arithmetic number, because the mean of its divisors is an integer number (260556730).

Almost surely, 2^521113459 is an apocalyptic number.

521113459 is a deficient number, since it is larger than the sum of its proper divisors (1).

521113459 is an equidigital number, since it uses as much as digits as its factorization.

521113459 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5400, while the sum is 31.

The square root of 521113459 is about 22827.9096502505. The cubic root of 521113459 is about 804.7187057762.

The spelling of 521113459 in words is "five hundred twenty-one million, one hundred thirteen thousand, four hundred fifty-nine".