22015145 has 8 divisors (see below), whose sum is σ = 26463240. Its totient is φ = 17582080.

The previous prime is 22015127. The next prime is 22015151. The reversal of 22015145 is 54151022.

22015145 = T₂₉₆₅ + T₂₉₆₆ + ... + T₂₉₆₉.

It can be written as a sum of positive squares in 4 ways, for example, as 1075369 + 20939776 = 1037^2 + 4576^2 .

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

It is not a de Polignac number, because 22015145 - 2¹⁰ = 22014121 is a prime.

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, 230 + ... + 6639.

It is an arithmetic number, because the mean of its divisors is an integer number (3307905).

Almost surely, 2^22015145 is an apocalyptic number.

It is an amenable number.

22015145 is a deficient number, since it is larger than the sum of its proper divisors (4448095).

22015145 is an equidigital number, since it uses as much as digits as its factorization.

22015145 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7515.

The product of its (nonzero) digits is 400, while the sum is 20.

The square root of 22015145 is about 4692.0299444910. The cubic root of 22015145 is about 280.2682166283.

Adding to 22015145 its reverse (54151022), we get a palindrome (76166167).

The spelling of 22015145 in words is "twenty-two million, fifteen thousand, one hundred forty-five".