6216220100 has 36 divisors (see below), whose sum is σ = 13673997204. Its totient is φ = 2452423680.

The previous prime is 6216220081. The next prime is 6216220133. The reversal of 6216220100 is 10226126.

It is a happy number.

It can be written as a sum of positive squares in 6 ways, for example, as 1404300676 + 4811919424 = 37474^2 + 69368^2 .

It is a Harshad number since it is a multiple of its sum of digits (20).

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 418469 + ... + 433068.

Almost surely, 2^6216220100 is an apocalyptic number.

It is an amenable number.

6216220100 is an abundant number, since it is smaller than the sum of its proper divisors (7457777104).

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

6216220100 is a wasteful number, since it uses less digits than its factorization.

6216220100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 851624 (or 851617 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 20.

The square root of 6216220100 is about 78843.0092018310. The cubic root of 6216220100 is about 1838.6911868430.

Adding to 6216220100 its reverse (10226126), we get a palindrome (6226446226).

The spelling of 6216220100 in words is "six billion, two hundred sixteen million, two hundred twenty thousand, one hundred".