2221642500 has 240 divisors, whose sum is σ = 8078214144. Its totient is φ = 461520000.

The previous prime is 2221642487. The next prime is 2221642517. The reversal of 2221642500 is 52461222.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 575577 + ... + 579423.

Almost surely, 2^2221642500 is an apocalyptic number.

2221642500 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 2221642500, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4039107072).

2221642500 is an abundant number, since it is smaller than the sum of its proper divisors (5856571644).

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

2221642500 is a wasteful number, since it uses less digits than its factorization.

2221642500 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3892 (or 3875 counting only the distinct ones).

The product of its (nonzero) digits is 1920, while the sum is 24.

The square root of 2221642500 is about 47134.3027953103. The cubic root of 2221642500 is about 1304.8423937320.

The spelling of 2221642500 in words is "two billion, two hundred twenty-one million, six hundred forty-two thousand, five hundred".