5206640321 has 4 divisors (see below), whose sum is σ = 5208241200. Its totient is φ = 5205039444.

The previous prime is 5206640317. The next prime is 5206640359. The reversal of 5206640321 is 1230466025.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 5206640321 - 2² = 5206640317 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5206640221) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 795551 + ... + 802068.

It is an arithmetic number, because the mean of its divisors is an integer number (1302060300).

Almost surely, 2^5206640321 is an apocalyptic number.

It is an amenable number.

5206640321 is a deficient number, since it is larger than the sum of its proper divisors (1600879).

5206640321 is a wasteful number, since it uses less digits than its factorization.

5206640321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1600878.

The product of its (nonzero) digits is 8640, while the sum is 29.

The square root of 5206640321 is about 72157.0531618358. The cubic root of 5206640321 is about 1733.2153464520.

The spelling of 5206640321 in words is "five billion, two hundred six million, six hundred forty thousand, three hundred twenty-one".