513650643 has 16 divisors (see below), whose sum is σ = 747791616. Its totient is φ = 311027040.

The previous prime is 513650629. The next prime is 513650647. The reversal of 513650643 is 346056315.

It is not a de Polignac number, because 513650643 - 2²⁰ = 512602067 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (33).

It is not an unprimeable number, because it can be changed into a prime (513650647) 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, 34530 + ... + 47112.

It is an arithmetic number, because the mean of its divisors is an integer number (46736976).

Almost surely, 2^513650643 is an apocalyptic number.

513650643 is a deficient number, since it is larger than the sum of its proper divisors (234140973).

513650643 is a wasteful number, since it uses less digits than its factorization.

513650643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13834.

The product of its (nonzero) digits is 32400, while the sum is 33.

The square root of 513650643 is about 22663.8620495272. The cubic root of 513650643 is about 800.8587876706.

It can be divided in two parts, 513 and 650643, that added together give a palindrome (651156).

The spelling of 513650643 in words is "five hundred thirteen million, six hundred fifty thousand, six hundred forty-three".