519012021 has 16 divisors (see below), whose sum is σ = 772485120. Its totient is φ = 307236720.

The previous prime is 519012019. The next prime is 519012029. The reversal of 519012021 is 120210915.

It is not a de Polignac number, because 519012021 - 2¹ = 519012019 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (519012029) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 181461 + ... + 184298.

It is an arithmetic number, because the mean of its divisors is an integer number (48280320).

Almost surely, 2^519012021 is an apocalyptic number.

It is an amenable number.

519012021 is a deficient number, since it is larger than the sum of its proper divisors (253473099).

519012021 is a wasteful number, since it uses less digits than its factorization.

519012021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 365816.

The product of its (nonzero) digits is 180, while the sum is 21.

The square root of 519012021 is about 22781.8353299290. The cubic root of 519012021 is about 803.6355477347.

Adding to 519012021 its reverse (120210915), we get a palindrome (639222936).

The spelling of 519012021 in words is "five hundred nineteen million, twelve thousand, twenty-one".