220032001 has 24 divisors (see below), whose sum is σ = 261937800. Its totient is φ = 184246272.

The previous prime is 220031993. The next prime is 220032011. The reversal of 220032001 is 100230022.

It can be written as a sum of positive squares in 4 ways, for example, as 55577025 + 164454976 = 7455^2 + 12824^2 .

It is not a de Polignac number, because 220032001 - 2³ = 220031993 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (220032011) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 489825 + ... + 490273.

It is an arithmetic number, because the mean of its divisors is an integer number (10914075).

Almost surely, 2^220032001 is an apocalyptic number.

It is an amenable number.

220032001 is a deficient number, since it is larger than the sum of its proper divisors (41905799).

220032001 is a wasteful number, since it uses less digits than its factorization.

220032001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 673 (or 666 counting only the distinct ones).

The product of its (nonzero) digits is 24, while the sum is 10.

The square root of 220032001 is about 14833.4756884555. The cubic root of 220032001 is about 603.7103425607.

Adding to 220032001 its reverse (100230022), we get a palindrome (320262023).

The spelling of 220032001 in words is "two hundred twenty million, thirty-two thousand, one".