1213230320 has 20 divisors (see below), whose sum is σ = 2820760680. Its totient is φ = 485292096.

The previous prime is 1213230311. The next prime is 1213230323. The reversal of 1213230320 is 230323121.

It is a tau number, because it is divible by the number of its divisors (20).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1213230323) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7582610 + ... + 7582769.

It is an arithmetic number, because the mean of its divisors is an integer number (141038034).

Almost surely, 2^1213230320 is an apocalyptic number.

1213230320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

1213230320 is an abundant number, since it is smaller than the sum of its proper divisors (1607530360).

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

1213230320 is a wasteful number, since it uses less digits than its factorization.

1213230320 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15165392 (or 15165386 counting only the distinct ones).

The product of its (nonzero) digits is 216, while the sum is 17.

The square root of 1213230320 is about 34831.4558983686. The cubic root of 1213230320 is about 1066.5496685911.

Adding to 1213230320 its reverse (230323121), we get a palindrome (1443553441).

The spelling of 1213230320 in words is "one billion, two hundred thirteen million, two hundred thirty thousand, three hundred twenty".