2221782528 has 80 divisors (see below), whose sum is σ = 6764567040. Its totient is φ = 634791936.

The previous prime is 2221782527. The next prime is 2221782557. The reversal of 2221782528 is 8252871222.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2221782527) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 92568 + ... + 114071.

It is an arithmetic number, because the mean of its divisors is an integer number (84557088).

Almost surely, 2^2221782528 is an apocalyptic number.

2221782528 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2221782528 is an abundant number, since it is smaller than the sum of its proper divisors (4542784512).

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

2221782528 is an equidigital number, since it uses as much as digits as its factorization.

2221782528 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 206667 (or 206651 counting only the distinct ones).

The product of its digits is 71680, while the sum is 39.

The square root of 2221782528 is about 47135.7881868968. The cubic root of 2221782528 is about 1304.8698074784.

The spelling of 2221782528 in words is "two billion, two hundred twenty-one million, seven hundred eighty-two thousand, five hundred twenty-eight".