6564421131 has 16 divisors (see below), whose sum is σ = 9219705600. Its totient is φ = 4143032928.

The previous prime is 6564421111. The next prime is 6564421139. The reversal of 6564421131 is 1311244656.

It is not a de Polignac number, because 6564421131 - 2¹⁴ = 6564404747 is a prime.

It is a super-2 number, since 2×6564421131² = 86183249570238638322, which contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 6564421092 and 6564421101.

It is not an unprimeable number, because it can be changed into a prime (6564421139) 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, 42685 + ... + 122273.

It is an arithmetic number, because the mean of its divisors is an integer number (576231600).

Almost surely, 2^6564421131 is an apocalyptic number.

6564421131 is a deficient number, since it is larger than the sum of its proper divisors (2655284469).

6564421131 is a wasteful number, since it uses less digits than its factorization.

6564421131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 81058.

The product of its digits is 17280, while the sum is 33.

The square root of 6564421131 is about 81021.1153403852. The cubic root of 6564421131 is about 1872.4007723756.

Adding to 6564421131 its reverse (1311244656), we get a palindrome (7875665787).

The spelling of 6564421131 in words is "six billion, five hundred sixty-four million, four hundred twenty-one thousand, one hundred thirty-one".