233320520 has 32 divisors (see below), whose sum is σ = 539163000. Its totient is φ = 90805248.

The previous prime is 233320517. The next prime is 233320523. The reversal of 233320520 is 25023332.

It is an interprime number because it is at equal distance from previous prime (233320517) and next prime (233320523).

It can be written as a sum of positive squares in 4 ways, for example, as 202606756 + 30713764 = 14234^2 + 5542^2 .

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 = 233320492 and 233320501.

It is not an unprimeable number, because it can be changed into a prime (233320523) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 77345 + ... + 80304.

Almost surely, 2^233320520 is an apocalyptic number.

233320520 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

233320520 is an abundant number, since it is smaller than the sum of its proper divisors (305842480).

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

233320520 is a wasteful number, since it uses less digits than its factorization.

233320520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157697 (or 157693 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 20.

The square root of 233320520 is about 15274.8328959763. The cubic root of 233320520 is about 615.6269808314.

Adding to 233320520 its reverse (25023332), we get a palindrome (258343852).

The spelling of 233320520 in words is "two hundred thirty-three million, three hundred twenty thousand, five hundred twenty".