22143855 has 16 divisors (see below), whose sum is σ = 35618400. Its totient is φ = 11747328.

The previous prime is 22143853. The next prime is 22143857. The reversal of 22143855 is 55834122.

It is an interprime number because it is at equal distance from previous prime (22143853) and next prime (22143857).

It is not a de Polignac number, because 22143855 - 2¹ = 22143853 is a prime.

It is a super-2 number, since 2×22143855² = 980700628522050, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143851) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 930 + ... + 6719.

It is an arithmetic number, because the mean of its divisors is an integer number (2226150).

Almost surely, 2^22143855 is an apocalyptic number.

22143855 is a deficient number, since it is larger than the sum of its proper divisors (13474545).

22143855 is a wasteful number, since it uses less digits than its factorization.

22143855 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7850.

The product of its digits is 9600, while the sum is 30.

The square root of 22143855 is about 4705.7257676154. The cubic root of 22143855 is about 280.8133451381.

Adding to 22143855 its reverse (55834122), we get a palindrome (77977977).

The spelling of 22143855 in words is "twenty-two million, one hundred forty-three thousand, eight hundred fifty-five".