2201985 has 20 divisors (see below), whose sum is σ = 3947988. Its totient is φ = 1174176.

The previous prime is 2201977. The next prime is 2201989. The reversal of 2201985 is 5891022.

It can be written as a sum of positive squares in 2 ways, for example, as 1016064 + 1185921 = 1008^2 + 1089^2 .

It is not a de Polignac number, because 2201985 - 2³ = 2201977 is a prime.

It is a hoax number, since the sum of its digits (27) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2201989) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 2314 + ... + 3123.

2^2201985 is an apocalyptic number.

It is an amenable number.

2201985 is a deficient number, since it is larger than the sum of its proper divisors (1746003).

2201985 is an equidigital number, since it uses as much as digits as its factorization.

2201985 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5454 (or 5445 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 2201985 is about 1483.9086899132. The cubic root of 2201985 is about 130.0982491996.

The spelling of 2201985 in words is "two million, two hundred one thousand, nine hundred eighty-five".