2221293890 has 16 divisors (see below), whose sum is σ = 4106392632. Its totient is φ = 864503424.

The previous prime is 2221293829. The next prime is 2221293917. The reversal of 2221293890 is 983921222.

It can be written as a sum of positive squares in 4 ways, for example, as 1907330929 + 313962961 = 43673^2 + 17719^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3001379 + ... + 3002118.

Almost surely, 2^2221293890 is an apocalyptic number.

2221293890 is a deficient number, since it is larger than the sum of its proper divisors (1885098742).

2221293890 is a wasteful number, since it uses less digits than its factorization.

2221293890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6003541.

The product of its (nonzero) digits is 31104, while the sum is 38.

The square root of 2221293890 is about 47130.6046004080. The cubic root of 2221293890 is about 1304.7741401911.

The spelling of 2221293890 in words is "two billion, two hundred twenty-one million, two hundred ninety-three thousand, eight hundred ninety".