220040001 has 12 divisors (see below), whose sum is σ = 317974800. Its totient is φ = 146629080.

The previous prime is 220039979. The next prime is 220040021. The reversal of 220040001 is 100040022.

It is not a de Polignac number, because 220040001 - 2¹⁵ = 220007233 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (9).

It is not an unprimeable number, because it can be changed into a prime (220040021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 25986 + ... + 33396.

It is an arithmetic number, because the mean of its divisors is an integer number (26497900).

Almost surely, 2^220040001 is an apocalyptic number.

It is an amenable number.

220040001 is a deficient number, since it is larger than the sum of its proper divisors (97934799).

220040001 is a wasteful number, since it uses less digits than its factorization.

220040001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10716 (or 10713 counting only the distinct ones).

The product of its (nonzero) digits is 16, while the sum is 9.

The square root of 220040001 is about 14833.7453463379. The cubic root of 220040001 is about 603.7176591089.

Adding to 220040001 its reverse (100040022), we get a palindrome (320080023).

The spelling of 220040001 in words is "two hundred twenty million, forty thousand, one".