1223205534 has 24 divisors (see below), whose sum is σ = 2650931712. Its totient is φ = 407634720.

The previous prime is 1223205499. The next prime is 1223205547. The reversal of 1223205534 is 4355023221.

It is a happy number.

1223205534 is a `hidden beast` number, since 122 + 3 + 2 + 0 + 5 + 534 = 666.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 1223205498 and 1223205507.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 119482 + ... + 129314.

It is an arithmetic number, because the mean of its divisors is an integer number (110455488).

Almost surely, 2^1223205534 is an apocalyptic number.

1223205534 is an abundant number, since it is smaller than the sum of its proper divisors (1427726178).

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

1223205534 is a wasteful number, since it uses less digits than its factorization.

1223205534 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16752 (or 16749 counting only the distinct ones).

The product of its (nonzero) digits is 7200, while the sum is 27.

The square root of 1223205534 is about 34974.3553764755. The cubic root of 1223205534 is about 1069.4647609835.

Adding to 1223205534 its reverse (4355023221), we get a palindrome (5578228755).

The spelling of 1223205534 in words is "one billion, two hundred twenty-three million, two hundred five thousand, five hundred thirty-four".