2281220221850 has 24 divisors (see below), whose sum is σ = 4245161013660. Its totient is φ = 912038325120.

The previous prime is 2281220221849. The next prime is 2281220221853. The reversal of 2281220221850 is 581220221822.

It can be written as a sum of positive squares in 6 ways, for example, as 1294513746289 + 986706475561 = 1137767^2 + 993331^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 2281220221850.

It is not an unprimeable number, because it can be changed into a prime (2281220221853) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 11141627 + ... + 11344526.

Almost surely, 2^{2281220221850} is an apocalyptic number.

2281220221850 is a deficient number, since it is larger than the sum of its proper divisors (1963940791810).

2281220221850 is a wasteful number, since it uses less digits than its factorization.

2281220221850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22488194 (or 22488189 counting only the distinct ones).

The product of its (nonzero) digits is 20480, while the sum is 35.

The spelling of 2281220221850 in words is "two trillion, two hundred eighty-one billion, two hundred twenty million, two hundred twenty-one thousand, eight hundred fifty".