22143755 has 4 divisors (see below), whose sum is σ = 26572512. Its totient is φ = 17715000.

The previous prime is 22143743. The next prime is 22143761. The reversal of 22143755 is 55734122.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 55734122 = 2 ⋅27867061.

It is not a de Polignac number, because 22143755 - 2¹⁸ = 21881611 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2214371 + ... + 2214380.

It is an arithmetic number, because the mean of its divisors is an integer number (6643128).

Almost surely, 2^22143755 is an apocalyptic number.

22143755 is a deficient number, since it is larger than the sum of its proper divisors (4428757).

22143755 is an equidigital number, since it uses as much as digits as its factorization.

22143755 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4428756.

The product of its digits is 8400, while the sum is 29.

The square root of 22143755 is about 4705.7151422499. The cubic root of 22143755 is about 280.8129224268.

Adding to 22143755 its reverse (55734122), we get a palindrome (77877877).

The spelling of 22143755 in words is "twenty-two million, one hundred forty-three thousand, seven hundred fifty-five".