521022440819 has 2 divisors, whose sum is σ = 521022440820. Its totient is φ = 521022440818.

The previous prime is 521022440791. The next prime is 521022440821. The reversal of 521022440819 is 918044220125.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 521022440819 - 2³⁶ = 452302964083 is a prime.

It is a super-2 number, since 2×521022440819² (a number of 24 digits) contains 22 as substring.

Together with 521022440821, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (521022440839) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 260511220409 + 260511220410.

It is an arithmetic number, because the mean of its divisors is an integer number (260511220410).

Almost surely, 2^521022440819 is an apocalyptic number.

521022440819 is a deficient number, since it is larger than the sum of its proper divisors (1).

521022440819 is an equidigital number, since it uses as much as digits as its factorization.

521022440819 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 46080, while the sum is 38.

The spelling of 521022440819 in words is "five hundred twenty-one billion, twenty-two million, four hundred forty thousand, eight hundred nineteen".