521044427 has 2 divisors, whose sum is σ = 521044428. Its totient is φ = 521044426.

The previous prime is 521044423. The next prime is 521044439. The reversal of 521044427 is 724440125.

521044427 is nontrivially palindromic in base 7.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 521044427 - 2² = 521044423 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 521044427.

It is not a weakly prime, because it can be changed into another prime (521044423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260522213 + 260522214.

It is an arithmetic number, because the mean of its divisors is an integer number (260522214).

Almost surely, 2^521044427 is an apocalyptic number.

521044427 is a deficient number, since it is larger than the sum of its proper divisors (1).

521044427 is an equidigital number, since it uses as much as digits as its factorization.

521044427 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8960, while the sum is 29.

The square root of 521044427 is about 22826.3975913853. The cubic root of 521044427 is about 804.6831704599.

The spelling of 521044427 in words is "five hundred twenty-one million, forty-four thousand, four hundred twenty-seven".