220001810 has 32 divisors (see below), whose sum is σ = 453123072. Its totient is φ = 75337920.

The previous prime is 220001809. The next prime is 220001819. The reversal of 220001810 is 18100022.

220001810 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×220001810² = 96801592806552200, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (14).

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (220001819) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 83615 + ... + 86205.

It is an arithmetic number, because the mean of its divisors is an integer number (14160096).

Almost surely, 2^220001810 is an apocalyptic number.

220001810 is an abundant number, since it is smaller than the sum of its proper divisors (233121262).

220001810 is a wasteful number, since it uses less digits than its factorization.

220001810 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3818.

The product of its (nonzero) digits is 32, while the sum is 14.

The square root of 220001810 is about 14832.4579891534. The cubic root of 220001810 is about 603.6827292248.

Adding to 220001810 its reverse (18100022), we get a palindrome (238101832).

The spelling of 220001810 in words is "two hundred twenty million, one thousand, eight hundred ten".