8213113511 has 4 divisors (see below), whose sum is σ = 8213394024. Its totient is φ = 8212833000.

The previous prime is 8213113507. The next prime is 8213113549. The reversal of 8213113511 is 1153113128.

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 8213113511 - 2² = 8213113507 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 (8213115511) by changing a digit.

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 in 3 ways as a sum of consecutive naturals, for example, 90440 + ... + 156861.

It is an arithmetic number, because the mean of its divisors is an integer number (2053348506).

Almost surely, 2^8213113511 is an apocalyptic number.

8213113511 is a deficient number, since it is larger than the sum of its proper divisors (280513).

8213113511 is a wasteful number, since it uses less digits than its factorization.

8213113511 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 280512.

The product of its digits is 720, while the sum is 26.

The square root of 8213113511 is about 90626.2297075190. The cubic root of 8213113511 is about 2017.6040532755.

Adding to 8213113511 its reverse (1153113128), we get a palindrome (9366226639).

The spelling of 8213113511 in words is "eight billion, two hundred thirteen million, one hundred thirteen thousand, five hundred eleven".