22665505 has 16 divisors (see below), whose sum is σ = 29106000. Its totient is φ = 16883712.

The previous prime is 22665493. The next prime is 22665523. The reversal of 22665505 is 50556622.

It can be written as a sum of positive squares in 8 ways, for example, as 613089 + 22052416 = 783^2 + 4696^2 .

It is a 3-Lehmer number, since φ(22665505) divides (22665505-1)³.

It is a cyclic number.

It is a Carmichael number.

It is not a de Polignac number, because 22665505 - 2¹¹ = 22663457 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 6871 + ... + 9619.

It is an arithmetic number, because the mean of its divisors is an integer number (1819125).

It is a Poulet number, since it divides 2^22665504-1.

Almost surely, 2^22665505 is an apocalyptic number.

22665505 is the 2749-th octagonal number.

It is an amenable number.

22665505 is a deficient number, since it is larger than the sum of its proper divisors (6440495).

22665505 is a wasteful number, since it uses less digits than its factorization.

22665505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2868.

The product of its (nonzero) digits is 18000, while the sum is 31.

The square root of 22665505 is about 4760.8302847298. The cubic root of 22665505 is about 283.0013235214.

The spelling of 22665505 in words is "twenty-two million, six hundred sixty-five thousand, five hundred five".