2212144400 has 60 divisors (see below), whose sum is σ = 5333861364. Its totient is φ = 881664000.

The previous prime is 2212144391. The next prime is 2212144411. The reversal of 2212144400 is 44412122.

It can be written as a sum of positive squares in 6 ways, for example, as 164762896 + 2047381504 = 12836^2 + 45248^2 .

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

It is an unprimeable number.

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

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 102560 + ... + 122240.

Almost surely, 2^2212144400 is an apocalyptic number.

2212144400 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 2212144400, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2666930682).

2212144400 is an abundant number, since it is smaller than the sum of its proper divisors (3121716964).

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

2212144400 is a wasteful number, since it uses less digits than its factorization.

2212144400 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19980 (or 19969 counting only the distinct ones).

The product of its (nonzero) digits is 512, while the sum is 20.

The square root of 2212144400 is about 47033.4391683194. The cubic root of 2212144400 is about 1302.9802238201.

Adding to 2212144400 its reverse (44412122), we get a palindrome (2256556522).

The spelling of 2212144400 in words is "two billion, two hundred twelve million, one hundred forty-four thousand, four hundred".