22320145 has 8 divisors (see below), whose sum is σ = 26824104. Its totient is φ = 17829504.

The previous prime is 22320131. The next prime is 22320187. The reversal of 22320145 is 54102322.

It can be written as a sum of positive squares in 4 ways, for example, as 7750656 + 14569489 = 2784^2 + 3817^2 .

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 22320145 - 2¹³ = 22311953 is a prime.

It is a super-3 number, since 3×22320145³ (a number of 23 digits) contains 333 as substring.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 837 + ... + 6733.

It is an arithmetic number, because the mean of its divisors is an integer number (3353013).

Almost surely, 2^22320145 is an apocalyptic number.

It is an amenable number.

22320145 is a deficient number, since it is larger than the sum of its proper divisors (4503959).

22320145 is an equidigital number, since it uses as much as digits as its factorization.

22320145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6659.

The product of its (nonzero) digits is 480, while the sum is 19.

The square root of 22320145 is about 4724.4200702308. The cubic root of 22320145 is about 281.5565730276.

Adding to 22320145 its reverse (54102322), we get a palindrome (76422467).

The spelling of 22320145 in words is "twenty-two million, three hundred twenty thousand, one hundred forty-five".