220001850 has 36 divisors (see below), whose sum is σ = 591072846. Its totient is φ = 58667040.

The previous prime is 220001849. The next prime is 220001857. The reversal of 220001850 is 58100022.

It can be written as a sum of positive squares in 3 ways, for example, as 160047801 + 59954049 = 12651^2 + 7743^2 .

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220001857) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 243997 + ... + 244896.

Almost surely, 2^220001850 is an apocalyptic number.

220001850 is an abundant number, since it is smaller than the sum of its proper divisors (371070996).

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

220001850 is a wasteful number, since it uses less digits than its factorization.

220001850 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 488911 (or 488903 counting only the distinct ones).

The product of its (nonzero) digits is 160, while the sum is 18.

The square root of 220001850 is about 14832.4593375475. The cubic root of 220001850 is about 603.6827658114.

Adding to 220001850 its reverse (58100022), we get a palindrome (278101872).

The spelling of 220001850 in words is "two hundred twenty million, one thousand, eight hundred fifty".