511423105220 has 24 divisors (see below), whose sum is σ = 1074003948864. Its totient is φ = 204566303456.

The previous prime is 511423105211. The next prime is 511423105243. The reversal of 511423105220 is 22501324115.

It is a self number, because there is not a number n which added to its sum of digits gives 511423105220.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1729457 + ... + 2003463.

It is an arithmetic number, because the mean of its divisors is an integer number (44750164536).

Almost surely, 2^511423105220 is an apocalyptic number.

It is an amenable number.

511423105220 is an abundant number, since it is smaller than the sum of its proper divisors (562580843644).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

511423105220 is a wasteful number, since it uses less digits than its factorization.

511423105220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 367339 (or 367337 counting only the distinct ones).

The product of its (nonzero) digits is 2400, while the sum is 26.

Adding to 511423105220 its reverse (22501324115), we get a palindrome (533924429335).

The spelling of 511423105220 in words is "five hundred eleven billion, four hundred twenty-three million, one hundred five thousand, two hundred twenty".