22640275 has 24 divisors (see below), whose sum is σ = 32703264. Its totient is φ = 15225600.

The previous prime is 22640269. The next prime is 22640287. The reversal of 22640275 is 57204622.

It is not a de Polignac number, because 22640275 - 2⁹ = 22639763 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 8055 + ... + 10495.

It is an arithmetic number, because the mean of its divisors is an integer number (1362636).

Almost surely, 2^22640275 is an apocalyptic number.

22640275 is a gapful number since it is divisible by the number (25) formed by its first and last digit.

22640275 is a deficient number, since it is larger than the sum of its proper divisors (10062989).

22640275 is a wasteful number, since it uses less digits than its factorization.

22640275 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2511 (or 2506 counting only the distinct ones).

The product of its (nonzero) digits is 6720, while the sum is 28.

The square root of 22640275 is about 4758.1797990408. The cubic root of 22640275 is about 282.8962773383.

Adding to 22640275 its reverse (57204622), we get a palindrome (79844897).

The spelling of 22640275 in words is "twenty-two million, six hundred forty thousand, two hundred seventy-five".