213832865816 has 8 divisors (see below), whose sum is σ = 400936623420. Its totient is φ = 106916432904.

The previous prime is 213832865767. The next prime is 213832865849. The reversal of 213832865816 is 618568238312.

It is a tau number, because it is divible by the number of its divisors (8).

It is a super-2 number, since 2×213832865816² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13364554106 + ... + 13364554121.

Almost surely, 2^213832865816 is an apocalyptic number.

It is an amenable number.

213832865816 is a deficient number, since it is larger than the sum of its proper divisors (187103757604).

213832865816 is a wasteful number, since it uses less digits than its factorization.

213832865816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26729108233 (or 26729108229 counting only the distinct ones).

The product of its digits is 3317760, while the sum is 53.

The spelling of 213832865816 in words is "two hundred thirteen billion, eight hundred thirty-two million, eight hundred sixty-five thousand, eight hundred sixteen".