6564216231 has 6 divisors (see below), whose sum is σ = 9481645680. Its totient is φ = 4376144148.

The previous prime is 6564216223. The next prime is 6564216233. The reversal of 6564216231 is 1326124656.

6564216231 is a `hidden beast` number, since 6 + 5 + 6 + 4 + 21 + 623 + 1 = 666.

It is not a de Polignac number, because 6564216231 - 2³ = 6564216223 is a prime.

It is a super-2 number, since 2×6564216231² = 86177869454647690722, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6564216233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 364678671 + ... + 364678688.

It is an arithmetic number, because the mean of its divisors is an integer number (1580274280).

Almost surely, 2^6564216231 is an apocalyptic number.

6564216231 is a deficient number, since it is larger than the sum of its proper divisors (2917429449).

6564216231 is a wasteful number, since it uses less digits than its factorization.

6564216231 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 729357365 (or 729357362 counting only the distinct ones).

The product of its digits is 51840, while the sum is 36.

The square root of 6564216231 is about 81019.8508453330. The cubic root of 6564216231 is about 1872.3812906421.

The spelling of 6564216231 in words is "six billion, five hundred sixty-four million, two hundred sixteen thousand, two hundred thirty-one".