1223523120 has 160 divisors (see below), whose sum is σ = 3914749440. Its totient is φ = 315965440.

The previous prime is 1223523089. The next prime is 1223523121. The reversal of 1223523120 is 213253221.

It is not an unprimeable number, because it can be changed into a prime (1223523121) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1004752 + ... + 1005968.

It is an arithmetic number, because the mean of its divisors is an integer number (24467184).

Almost surely, 2^1223523120 is an apocalyptic number.

1223523120 is a gapful number since it is divisible by the number (10) 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 1223523120, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1957374720).

1223523120 is an abundant number, since it is smaller than the sum of its proper divisors (2691226320).

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

1223523120 is a wasteful number, since it uses less digits than its factorization.

1223523120 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1363 (or 1357 counting only the distinct ones).

The product of its (nonzero) digits is 720, while the sum is 21.

The square root of 1223523120 is about 34978.8953513401. The cubic root of 1223523120 is about 1069.5573095197.

Adding to 1223523120 its reverse (213253221), we get a palindrome (1436776341).

The spelling of 1223523120 in words is "one billion, two hundred twenty-three million, five hundred twenty-three thousand, one hundred twenty".