512302021355544 has 128 divisors (see below), whose sum is σ = 1478235477196800. Its totient is φ = 144920509862400.

The previous prime is 512302021355543. The next prime is 512302021355609. The reversal of 512302021355544 is 445553120203215.

It is a super-2 number, since 2×512302021355544² (a number of 30 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is a junction number, because it is equal to n+sod(n) for n = 512302021355496 and 512302021355505.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (512302021355543) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1292067694 + ... + 1292464130.

It is an arithmetic number, because the mean of its divisors is an integer number (11548714665600).

Almost surely, 2^{512302021355544} is an apocalyptic number.

It is an amenable number.

512302021355544 is an abundant number, since it is smaller than the sum of its proper divisors (965933455841256).

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

512302021355544 is a wasteful number, since it uses less digits than its factorization.

512302021355544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 472713 (or 472709 counting only the distinct ones).

The product of its (nonzero) digits is 720000, while the sum is 42.

Adding to 512302021355544 its reverse (445553120203215), we get a palindrome (957855141558759).

The spelling of 512302021355544 in words is "five hundred twelve trillion, three hundred two billion, twenty-one million, three hundred fifty-five thousand, five hundred forty-four".