8216261583213 has 4 divisors (see below), whose sum is σ = 10955015444288. Its totient is φ = 5477507722140.

The previous prime is 8216261583199. The next prime is 8216261583259. The reversal of 8216261583213 is 3123851626128.

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 not a de Polignac number, because 8216261583213 - 2⁴ = 8216261583197 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (8216261587213) 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, 1369376930533 + ... + 1369376930538.

It is an arithmetic number, because the mean of its divisors is an integer number (2738753861072).

Almost surely, 2^{8216261583213} is an apocalyptic number.

It is an amenable number.

8216261583213 is a deficient number, since it is larger than the sum of its proper divisors (2738753861075).

8216261583213 is a wasteful number, since it uses less digits than its factorization.

8216261583213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2738753861074.

The product of its digits is 829440, while the sum is 48.

The spelling of 8216261583213 in words is "eight trillion, two hundred sixteen billion, two hundred sixty-one million, five hundred eighty-three thousand, two hundred thirteen".