2215444000 has 192 divisors, whose sum is σ = 6787452672. Its totient is φ = 690432000.

The previous prime is 2215443983. The next prime is 2215444001. The reversal of 2215444000 is 4445122.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (22).

It is not an unprimeable number, because it can be changed into a prime (2215444001) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 304404 + ... + 311596.

It is an arithmetic number, because the mean of its divisors is an integer number (35351316).

Almost surely, 2^2215444000 is an apocalyptic number.

2215444000 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 2215444000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3393726336).

2215444000 is an abundant number, since it is smaller than the sum of its proper divisors (4572008672).

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

2215444000 is a wasteful number, since it uses less digits than its factorization.

2215444000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7236 (or 7218 counting only the distinct ones).

The product of its (nonzero) digits is 1280, while the sum is 22.

The square root of 2215444000 is about 47068.5032691714. The cubic root of 2215444000 is about 1303.6277369631.

Adding to 2215444000 its reverse (4445122), we get a palindrome (2219889122).

The spelling of 2215444000 in words is "two billion, two hundred fifteen million, four hundred forty-four thousand".