2221231985 has 64 divisors (see below), whose sum is σ = 3363379200. Its totient is φ = 1402168320.

The previous prime is 2221231981. The next prime is 2221232011. The reversal of 2221231985 is 5891321222.

It is not a de Polignac number, because 2221231985 - 2² = 2221231981 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (35).

It is not an unprimeable number, because it can be changed into a prime (2221231981) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 1369475 + ... + 1371095.

It is an arithmetic number, because the mean of its divisors is an integer number (52552800).

Almost surely, 2^2221231985 is an apocalyptic number.

It is an amenable number.

2221231985 is a deficient number, since it is larger than the sum of its proper divisors (1142147215).

2221231985 is a wasteful number, since it uses less digits than its factorization.

2221231985 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1711 (or 1697 counting only the distinct ones).

The product of its digits is 17280, while the sum is 35.

The square root of 2221231985 is about 47129.9478569625. The cubic root of 2221231985 is about 1304.7620192086.

The spelling of 2221231985 in words is "two billion, two hundred twenty-one million, two hundred thirty-one thousand, nine hundred eighty-five".