1223275536 has 120 divisors (see below), whose sum is σ = 3953191424. Its totient is φ = 345876480.

The previous prime is 1223275523. The next prime is 1223275589. The reversal of 1223275536 is 6355723221.

1223275536 is a `hidden beast` number, since 1 + 22 + 32 + 75 + 536 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a self number, because there is not a number n which added to its sum of digits gives 1223275536.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 91521 + ... + 104031.

Almost surely, 2^1223275536 is an apocalyptic number.

1223275536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1223275536, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1976595712).

1223275536 is an abundant number, since it is smaller than the sum of its proper divisors (2729915888).

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

1223275536 is a wasteful number, since it uses less digits than its factorization.

1223275536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 12629 (or 12620 counting only the distinct ones).

The product of its digits is 75600, while the sum is 36.

The square root of 1223275536 is about 34975.3561239911. The cubic root of 1223275536 is about 1069.4851618188.

Adding to 1223275536 its reverse (6355723221), we get a palindrome (7578998757).

The spelling of 1223275536 in words is "one billion, two hundred twenty-three million, two hundred seventy-five thousand, five hundred thirty-six".