513344501621 has 16 divisors (see below), whose sum is σ = 588279836160. Its totient is φ = 438810852480.

The previous prime is 513344501609. The next prime is 513344501707. The reversal of 513344501621 is 126105443315.

It is not a de Polignac number, because 513344501621 - 2¹⁰ = 513344500597 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513344500621) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 3869375 + ... + 3999843.

It is an arithmetic number, because the mean of its divisors is an integer number (36767489760).

Almost surely, 2^513344501621 is an apocalyptic number.

It is an amenable number.

513344501621 is a deficient number, since it is larger than the sum of its proper divisors (74935334539).

513344501621 is a wasteful number, since it uses less digits than its factorization.

513344501621 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 132004.

The product of its (nonzero) digits is 43200, while the sum is 35.

Adding to 513344501621 its reverse (126105443315), we get a palindrome (639449944936).

The spelling of 513344501621 in words is "five hundred thirteen billion, three hundred forty-four million, five hundred one thousand, six hundred twenty-one".