511111100050 has 12 divisors (see below), whose sum is σ = 950666646186. Its totient is φ = 204444440000.

The previous prime is 511111099987. The next prime is 511111100051. The reversal of 511111100050 is 50001111115.

It can be written as a sum of positive squares in 3 ways, for example, as 390838779241 + 120272320809 = 625171^2 + 346803^2 .

It is a super-2 number, since 2×511111100050² (a number of 24 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 511111099997 and 511111100033.

It is not an unprimeable number, because it can be changed into a prime (511111100051) by changing a digit.

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 5 ways as a sum of consecutive naturals, for example, 5111110951 + ... + 5111111050.

Almost surely, 2^511111100050 is an apocalyptic number.

511111100050 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

511111100050 is a deficient number, since it is larger than the sum of its proper divisors (439555546136).

511111100050 is a wasteful number, since it uses less digits than its factorization.

511111100050 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10222222013 (or 10222222008 counting only the distinct ones).

The product of its (nonzero) digits is 25, while the sum is 16.

Adding to 511111100050 its reverse (50001111115), we get a palindrome (561112211165).

The spelling of 511111100050 in words is "five hundred eleven billion, one hundred eleven million, one hundred thousand, fifty".