22155505 has 16 divisors (see below), whose sum is σ = 28618704. Its totient is φ = 16404480.

The previous prime is 22155491. The next prime is 22155547. The reversal of 22155505 is 50555122.

It is a happy number.

It can be written as a sum of positive squares in 8 ways, for example, as 2521744 + 19633761 = 1588^2 + 4431^2 .

It is not a de Polignac number, because 22155505 - 2¹¹ = 22153457 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 22155505.

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, 3049 + ... + 7321.

It is an arithmetic number, because the mean of its divisors is an integer number (1788669).

Almost surely, 2^22155505 is an apocalyptic number.

It is an amenable number.

22155505 is a deficient number, since it is larger than the sum of its proper divisors (6463199).

22155505 is a wasteful number, since it uses less digits than its factorization.

22155505 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4356.

The product of its (nonzero) digits is 2500, while the sum is 25.

The square root of 22155505 is about 4706.9634585367. The cubic root of 22155505 is about 280.8625823031.

The spelling of 22155505 in words is "twenty-two million, one hundred fifty-five thousand, five hundred five".