513804447021 has 16 divisors (see below), whose sum is σ = 701960148288. Its totient is φ = 334096771200.

The previous prime is 513804447001. The next prime is 513804447029. The reversal of 513804447021 is 120744408315.

It is not a de Polignac number, because 513804447021 - 2¹⁷ = 513804315949 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513804447029) 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, 43690 + ... + 1014651.

It is an arithmetic number, because the mean of its divisors is an integer number (43872509268).

Almost surely, 2^513804447021 is an apocalyptic number.

It is an amenable number.

513804447021 is a deficient number, since it is larger than the sum of its proper divisors (188155701267).

513804447021 is a wasteful number, since it uses less digits than its factorization.

513804447021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1062332.

The product of its (nonzero) digits is 107520, while the sum is 39.

The spelling of 513804447021 in words is "five hundred thirteen billion, eight hundred four million, four hundred forty-seven thousand, twenty-one".