2215944528 has 80 divisors (see below), whose sum is σ = 6566901120. Its totient is φ = 630747648.

The previous prime is 2215944527. The next prime is 2215944569. The reversal of 2215944528 is 8254495122.

It is a super-3 number, since 3×2215944528³ (a number of 29 digits) contains 333 as substring.

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

It is a self number, because there is not a number n which added to its sum of digits gives 2215944528.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2215944527) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 78126 + ... + 102642.

It is an arithmetic number, because the mean of its divisors is an integer number (82086264).

Almost surely, 2^2215944528 is an apocalyptic number.

2215944528 is a gapful number since it is divisible by the number (28) 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 2215944528, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3283450560).

2215944528 is an abundant number, since it is smaller than the sum of its proper divisors (4350956592).

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

2215944528 is a wasteful number, since it uses less digits than its factorization.

2215944528 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 24804 (or 24798 counting only the distinct ones).

The product of its digits is 230400, while the sum is 42.

The square root of 2215944528 is about 47073.8199852105. The cubic root of 2215944528 is about 1303.7259043509.

The spelling of 2215944528 in words is "two billion, two hundred fifteen million, nine hundred forty-four thousand, five hundred twenty-eight".