22281001 has 8 divisors (see below), whose sum is σ = 22592520. Its totient is φ = 21971712.

The previous prime is 22280989. The next prime is 22281023. The reversal of 22281001 is 10018222.

It can be written as a sum of positive squares in 4 ways, for example, as 331776 + 21949225 = 576^2 + 4685^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 22281001 - 2¹¹ = 22278953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (22281071) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 30031 + ... + 30763.

It is an arithmetic number, because the mean of its divisors is an integer number (2824065).

Almost surely, 2^22281001 is an apocalyptic number.

It is an amenable number.

22281001 is a deficient number, since it is larger than the sum of its proper divisors (311519).

22281001 is a wasteful number, since it uses less digits than its factorization.

22281001 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1115.

The product of its (nonzero) digits is 64, while the sum is 16.

The square root of 22281001 is about 4720.2755216195. The cubic root of 22281001 is about 281.3918832429.

Adding to 22281001 its reverse (10018222), we get a palindrome (32299223).

The spelling of 22281001 in words is "twenty-two million, two hundred eighty-one thousand, one".