103228409 has 8 divisors (see below), whose sum is σ = 107758728. Its totient is φ = 98789760.

The previous prime is 103228399. The next prime is 103228417. The reversal of 103228409 is 904822301.

It can be written as a sum of positive squares in 4 ways, for example, as 3168400 + 100060009 = 1780^2 + 10003^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-103228409 is a prime.

It is a super-2 number, since 2×103228409² = 21312208849342562, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103228009) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20612 + ... + 25125.

It is an arithmetic number, because the mean of its divisors is an integer number (13469841).

Almost surely, 2^103228409 is an apocalyptic number.

It is an amenable number.

103228409 is a deficient number, since it is larger than the sum of its proper divisors (4530319).

103228409 is an equidigital number, since it uses as much as digits as its factorization.

103228409 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 45835.

The product of its (nonzero) digits is 3456, while the sum is 29.

The square root of 103228409 is about 10160.1382372485. The cubic root of 103228409 is about 469.1010567480.

The spelling of 103228409 in words is "one hundred three million, two hundred twenty-eight thousand, four hundred nine".