1223331320 has 16 divisors (see below), whose sum is σ = 2752495560. Its totient is φ = 489332512.

The previous prime is 1223331313. The next prime is 1223331371. The reversal of 1223331320 is 231333221.

It is a Harshad number since it is a multiple of its sum of digits (20).

It is a junction number, because it is equal to n+sod(n) for n = 1223331292 and 1223331301.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 15291602 + ... + 15291681.

Almost surely, 2^1223331320 is an apocalyptic number.

1223331320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1223331320 is an abundant number, since it is smaller than the sum of its proper divisors (1529164240).

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

1223331320 is a wasteful number, since it uses less digits than its factorization.

1223331320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30583294 (or 30583290 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 20.

The square root of 1223331320 is about 34976.1535906966. The cubic root of 1223331320 is about 1069.5014185143.

Adding to 1223331320 its reverse (231333221), we get a palindrome (1454664541).

The spelling of 1223331320 in words is "one billion, two hundred twenty-three million, three hundred thirty-one thousand, three hundred twenty".