8620213531 has 4 divisors (see below), whose sum is σ = 9073909000. Its totient is φ = 8166518064.

The previous prime is 8620213517. The next prime is 8620213577. The reversal of 8620213531 is 1353120268.

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 8620213531 - 2⁵ = 8620213499 is a prime.

It is a super-2 number, since 2×8620213531² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 8620213493 and 8620213502.

It is not an unprimeable number, because it can be changed into a prime (8620213331) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 226847706 + ... + 226847743.

It is an arithmetic number, because the mean of its divisors is an integer number (2268477250).

Almost surely, 2^8620213531 is an apocalyptic number.

8620213531 is a deficient number, since it is larger than the sum of its proper divisors (453695469).

8620213531 is a wasteful number, since it uses less digits than its factorization.

8620213531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 453695468.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 8620213531 is about 92845.1050459851. The cubic root of 8620213531 is about 2050.4035319834.

Adding to 8620213531 its reverse (1353120268), we get a palindrome (9973333799).

The spelling of 8620213531 in words is "eight billion, six hundred twenty million, two hundred thirteen thousand, five hundred thirty-one".