22162155 has 8 divisors (see below), whose sum is σ = 35459472. Its totient is φ = 11819808.

The previous prime is 22162141. The next prime is 22162159. The reversal of 22162155 is 55126122.

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 22162155 - 2⁴ = 22162139 is a prime.

It is a super-2 number, since 2×22162155² = 982322228488050, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (22162159) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 738724 + ... + 738753.

It is an arithmetic number, because the mean of its divisors is an integer number (4432434).

Almost surely, 2^22162155 is an apocalyptic number.

22162155 is a deficient number, since it is larger than the sum of its proper divisors (13297317).

22162155 is a wasteful number, since it uses less digits than its factorization.

22162155 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1477485.

The product of its digits is 1200, while the sum is 24.

The square root of 22162155 is about 4707.6698057532. The cubic root of 22162155 is about 280.8906798998.

Adding to 22162155 its reverse (55126122), we get a palindrome (77288277).

It can be divided in two parts, 2216 and 2155, that added together give a triangular number (4371 = T₉₃).

The spelling of 22162155 in words is "twenty-two million, one hundred sixty-two thousand, one hundred fifty-five".