2221357864 has 16 divisors (see below), whose sum is σ = 4543686720. Its totient is φ = 1009708080.

The previous prime is 2221357813. The next prime is 2221357877. The reversal of 2221357864 is 4687531222.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12621264 + ... + 12621439.

It is an arithmetic number, because the mean of its divisors is an integer number (283980420).

Almost surely, 2^2221357864 is an apocalyptic number.

It is an amenable number.

2221357864 is an abundant number, since it is smaller than the sum of its proper divisors (2322328856).

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

2221357864 is a wasteful number, since it uses less digits than its factorization.

2221357864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25242720 (or 25242716 counting only the distinct ones).

The product of its digits is 161280, while the sum is 40.

The square root of 2221357864 is about 47131.2832840355. The cubic root of 2221357864 is about 1304.7866660467.

The spelling of 2221357864 in words is "two billion, two hundred twenty-one million, three hundred fifty-seven thousand, eight hundred sixty-four".