22155405 has 8 divisors (see below), whose sum is σ = 35448672. Its totient is φ = 11816208.

The previous prime is 22155373. The next prime is 22155407. The reversal of 22155405 is 50455122.

It is a happy number.

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

It is not a de Polignac number, because 22155405 - 2⁵ = 22155373 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22155407) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738499 + ... + 738528.

It is an arithmetic number, because the mean of its divisors is an integer number (4431084).

Almost surely, 2^22155405 is an apocalyptic number.

It is an amenable number.

22155405 is a deficient number, since it is larger than the sum of its proper divisors (13293267).

22155405 is a wasteful number, since it uses less digits than its factorization.

22155405 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477035.

The product of its (nonzero) digits is 2000, while the sum is 24.

The square root of 22155405 is about 4706.9528359651. The cubic root of 22155405 is about 280.8621597399.

The spelling of 22155405 in words is "twenty-two million, one hundred fifty-five thousand, four hundred five".