22143630 has 16 divisors (see below), whose sum is σ = 53144784. Its totient is φ = 5904960.

The previous prime is 22143587. The next prime is 22143631. The reversal of 22143630 is 3634122.

It is a happy number.

It is a junction number, because it is equal to n+sod(n) for n = 22143597 and 22143606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (22143631) 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, 369031 + ... + 369090.

It is an arithmetic number, because the mean of its divisors is an integer number (3321549).

Almost surely, 2^22143630 is an apocalyptic number.

22143630 is an abundant number, since it is smaller than the sum of its proper divisors (31001154).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

22143630 is a wasteful number, since it uses less digits than its factorization.

22143630 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738131.

The product of its (nonzero) digits is 864, while the sum is 21.

The square root of 22143630 is about 4705.7018605092. The cubic root of 22143630 is about 280.8123940358.

Adding to 22143630 its reverse (3634122), we get a palindrome (25777752).

The spelling of 22143630 in words is "twenty-two million, one hundred forty-three thousand, six hundred thirty".