2196621000 has 576 divisors, whose sum is σ = 9176010480. Its totient is φ = 470937600.

The previous prime is 2196620977. The next prime is 2196621001. The reversal of 2196621000 is 1266912.

It can be written as a sum of positive squares in 8 ways, for example, as 706815396 + 1489805604 = 26586^2 + 38598^2 .

It is not an unprimeable number, because it can be changed into a prime (2196621001) by changing a digit.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 7496854 + ... + 7497146.

Almost surely, 2^2196621000 is an apocalyptic number.

2196621000 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2196621000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4588005240).

2196621000 is an abundant number, since it is smaller than the sum of its proper divisors (6979389480).

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

2196621000 is a wasteful number, since it uses less digits than its factorization.

2196621000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 351 (or 327 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 2196621000 is about 46868.1234956127. The cubic root of 2196621000 is about 1299.9252422494.

Adding to 2196621000 its reverse (1266912), we get a palindrome (2197887912).

The spelling of 2196621000 in words is "two billion, one hundred ninety-six million, six hundred twenty-one thousand".