1223210056 has 8 divisors (see below), whose sum is σ = 2293518870. Its totient is φ = 611605024.

The previous prime is 1223210041. The next prime is 1223210057. The reversal of 1223210056 is 6500123221.

It can be written as a sum of positive squares in only one way, i.e., 629508100 + 593701956 = 25090^2 + 24366^2 .

It is a tau number, because it is divible by the number of its divisors (8).

It is not an unprimeable number, because it can be changed into a prime (1223210057) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 76450621 + ... + 76450636.

Almost surely, 2^1223210056 is an apocalyptic number.

It is an amenable number.

1223210056 is a deficient number, since it is larger than the sum of its proper divisors (1070308814).

1223210056 is a wasteful number, since it uses less digits than its factorization.

1223210056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152901263 (or 152901259 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 22.

The square root of 1223210056 is about 34974.4200237831. The cubic root of 1223210056 is about 1069.4660788633.

Adding to 1223210056 its reverse (6500123221), we get a palindrome (7723333277).

The spelling of 1223210056 in words is "one billion, two hundred twenty-three million, two hundred ten thousand, fifty-six".