513403517421 has 48 divisors (see below), whose sum is σ = 785511767040. Its totient is φ = 322223754240.

The previous prime is 513403517411. The next prime is 513403517437. The reversal of 513403517421 is 124715304315.

513403517421 is a `hidden beast` number, since 5 + 134 + 0 + 3 + 517 + 4 + 2 + 1 = 666.

It is not a de Polignac number, because 513403517421 - 2²¹ = 513401420269 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (513403517411) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 33731205 + ... + 33746421.

It is an arithmetic number, because the mean of its divisors is an integer number (16364828480).

Almost surely, 2^513403517421 is an apocalyptic number.

It is an amenable number.

513403517421 is a deficient number, since it is larger than the sum of its proper divisors (272108249619).

513403517421 is a wasteful number, since it uses less digits than its factorization.

513403517421 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16466 (or 16463 counting only the distinct ones).

The product of its (nonzero) digits is 50400, while the sum is 36.

The spelling of 513403517421 in words is "five hundred thirteen billion, four hundred three million, five hundred seventeen thousand, four hundred twenty-one".