206223557316 has 24 divisors (see below), whose sum is σ = 549929486400. Its totient is φ = 58921016352.

The previous prime is 206223557311. The next prime is 206223557339. The reversal of 206223557316 is 613755322602.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (206223557311) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1227521091 + ... + 1227521258.

It is an arithmetic number, because the mean of its divisors is an integer number (22913728600).

Almost surely, 2^206223557316 is an apocalyptic number.

It is an amenable number.

206223557316 is an abundant number, since it is smaller than the sum of its proper divisors (343705929084).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

206223557316 is a wasteful number, since it uses less digits than its factorization.

206223557316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2455042363 (or 2455042361 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 42.

Adding to 206223557316 its reverse (613755322602), we get a palindrome (819978879918).

The spelling of 206223557316 in words is "two hundred six billion, two hundred twenty-three million, five hundred fifty-seven thousand, three hundred sixteen".