103212320 has 24 divisors (see below), whose sum is σ = 243839484. Its totient is φ = 41284864.

The previous prime is 103212311. The next prime is 103212323. The reversal of 103212320 is 23212301.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 100240144 + 2972176 = 10012^2 + 1724^2 .

It is a junction number, because it is equal to n+sod(n) for n = 103212295 and 103212304.

It is not an unprimeable number, because it can be changed into a prime (103212323) 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 3 ways as a sum of consecutive naturals, for example, 322379 + ... + 322698.

Almost surely, 2^103212320 is an apocalyptic number.

103212320 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103212320 is an abundant number, since it is smaller than the sum of its proper divisors (140627164).

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

103212320 is an equidigital number, since it uses as much as digits as its factorization.

103212320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 645092 (or 645084 counting only the distinct ones).

The product of its (nonzero) digits is 72, while the sum is 14.

The square root of 103212320 is about 10159.3464356719. The cubic root of 103212320 is about 469.0766843906.

Adding to 103212320 its reverse (23212301), we get a palindrome (126424621).

The spelling of 103212320 in words is "one hundred three million, two hundred twelve thousand, three hundred twenty".