1223273536 has 14 divisors (see below), whose sum is σ = 2427433550. Its totient is φ = 611636736.

The previous prime is 1223273521. The next prime is 1223273543. The reversal of 1223273536 is 6353723221.

It can be written as a sum of positive squares in only one way, i.e., 1221083136 + 2190400 = 34944^2 + 1480^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9556761 + ... + 9556888.

Almost surely, 2^1223273536 is an apocalyptic number.

1223273536 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

1223273536 is a deficient number, since it is larger than the sum of its proper divisors (1204160014).

1223273536 is an equidigital number, since it uses as much as digits as its factorization.

1223273536 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19113661 (or 19113651 counting only the distinct ones).

The product of its digits is 45360, while the sum is 34.

The square root of 1223273536 is about 34975.3275324192. The cubic root of 1223273536 is about 1069.4845789653.

Adding to 1223273536 its reverse (6353723221), we get a palindrome (7576996757).

The spelling of 1223273536 in words is "one billion, two hundred twenty-three million, two hundred seventy-three thousand, five hundred thirty-six".