288220001 has 4 divisors (see below), whose sum is σ = 288323604. Its totient is φ = 288116400.

The previous prime is 288219983. The next prime is 288220021. The reversal of 288220001 is 100022882.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 145178401 + 143041600 = 12049^2 + 11960^2 .

It is a cyclic number.

It is not a de Polignac number, because 288220001 - 2¹⁰ = 288218977 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (288220021) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 47510 + ... + 53231.

It is an arithmetic number, because the mean of its divisors is an integer number (72080901).

Almost surely, 2^288220001 is an apocalyptic number.

It is an amenable number.

288220001 is a deficient number, since it is larger than the sum of its proper divisors (103603).

288220001 is a wasteful number, since it uses less digits than its factorization.

288220001 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103602.

The product of its (nonzero) digits is 512, while the sum is 23.

The square root of 288220001 is about 16977.0433527160. The cubic root of 288220001 is about 660.5535614466.

Adding to 288220001 its reverse (100022882), we get a palindrome (388242883).

The spelling of 288220001 in words is "two hundred eighty-eight million, two hundred twenty thousand, one".