511020533140 has 24 divisors (see below), whose sum is σ = 1155692590920. Its totient is φ = 188684504448.

The previous prime is 511020533123. The next prime is 511020533141. The reversal of 511020533140 is 41335020115.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 876041604 + 510144491536 = 29598^2 + 714244^2 .

It is a super-2 number, since 2×511020533140² (a number of 24 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (511020533141) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 982731535 + ... + 982732054.

It is an arithmetic number, because the mean of its divisors is an integer number (48153857955).

Almost surely, 2^511020533140 is an apocalyptic number.

It is an amenable number.

511020533140 is an abundant number, since it is smaller than the sum of its proper divisors (644672057780).

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

511020533140 is a wasteful number, since it uses less digits than its factorization.

511020533140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1965463611 (or 1965463609 counting only the distinct ones).

The product of its (nonzero) digits is 1800, while the sum is 25.

Adding to 511020533140 its reverse (41335020115), we get a palindrome (552355553255).

The spelling of 511020533140 in words is "five hundred eleven billion, twenty million, five hundred thirty-three thousand, one hundred forty".