513203256420 has 24 divisors (see below), whose sum is σ = 1436969118144. Its totient is φ = 136854201696.

The previous prime is 513203256407. The next prime is 513203256431. The reversal of 513203256420 is 24652302315.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4276693744 + ... + 4276693863.

It is an arithmetic number, because the mean of its divisors is an integer number (59873713256).

Almost surely, 2^513203256420 is an apocalyptic number.

It is an amenable number.

513203256420 is an abundant number, since it is smaller than the sum of its proper divisors (923765861724).

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

513203256420 is a wasteful number, since it uses less digits than its factorization.

513203256420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8553387619 (or 8553387617 counting only the distinct ones).

The product of its (nonzero) digits is 43200, while the sum is 33.

Adding to 513203256420 its reverse (24652302315), we get a palindrome (537855558735).

The spelling of 513203256420 in words is "five hundred thirteen billion, two hundred three million, two hundred fifty-six thousand, four hundred twenty".