6520163431 has 4 divisors (see below), whose sum is σ = 6520638592. Its totient is φ = 6519688272.

The previous prime is 6520163413. The next prime is 6520163437. The reversal of 6520163431 is 1343610256.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 6520163431 - 2¹¹ = 6520161383 is a prime.

It is a super-2 number, since 2×6520163431² = 85025062333899383522, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 6520163393 and 6520163402.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6520163437) 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, 216366 + ... + 244651.

It is an arithmetic number, because the mean of its divisors is an integer number (1630159648).

Almost surely, 2^6520163431 is an apocalyptic number.

6520163431 is a deficient number, since it is larger than the sum of its proper divisors (475161).

6520163431 is a wasteful number, since it uses less digits than its factorization.

6520163431 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 475160.

The product of its (nonzero) digits is 12960, while the sum is 31.

The square root of 6520163431 is about 80747.5289467114. The cubic root of 6520163431 is about 1868.1833359538.

Adding to 6520163431 its reverse (1343610256), we get a palindrome (7863773687).

The spelling of 6520163431 in words is "six billion, five hundred twenty million, one hundred sixty-three thousand, four hundred thirty-one".