512521220000 has 60 divisors (see below), whose sum is σ = 1260879128586. Its totient is φ = 205008480000.

The previous prime is 512521219997. The next prime is 512521220017. The reversal of 512521220000 is 22125215.

It is a happy number.

It can be written as a sum of positive squares in 5 ways, for example, as 39072638224 + 473448581776 = 197668^2 + 688076^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 12793031 + ... + 12833030.

Almost surely, 2^512521220000 is an apocalyptic number.

512521220000 is a gapful number since it is divisible by the number (50) formed by its first and last digit.

It is an amenable number.

512521220000 is an abundant number, since it is smaller than the sum of its proper divisors (748357908586).

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

512521220000 is an equidigital number, since it uses as much as digits as its factorization.

512521220000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25626091 (or 25626068 counting only the distinct ones).

The product of its (nonzero) digits is 400, while the sum is 20.

Adding to 512521220000 its reverse (22125215), we get a palindrome (512543345215).

The spelling of 512521220000 in words is "five hundred twelve billion, five hundred twenty-one million, two hundred twenty thousand".