22143155 has 16 divisors (see below), whose sum is σ = 27125280. Its totient is φ = 17349888.

The previous prime is 22143137. The next prime is 22143161. The reversal of 22143155 is 55134122.

It is a cyclic number.

It is not a de Polignac number, because 22143155 - 2⁶ = 22143091 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 22143155.

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, 94919 + ... + 95151.

It is an arithmetic number, because the mean of its divisors is an integer number (1695330).

Almost surely, 2^22143155 is an apocalyptic number.

22143155 is a deficient number, since it is larger than the sum of its proper divisors (4982125).

22143155 is a wasteful number, since it uses less digits than its factorization.

22143155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 550.

The product of its digits is 1200, while the sum is 23.

The square root of 22143155 is about 4705.6513895528. The cubic root of 22143155 is about 280.8103861319.

Adding to 22143155 its reverse (55134122), we get a palindrome (77277277).

The spelling of 22143155 in words is "twenty-two million, one hundred forty-three thousand, one hundred fifty-five".