103221440 has 168 divisors, whose sum is σ = 297088560. Its totient is φ = 34019328.

The previous prime is 103221439. The next prime is 103221449. The reversal of 103221440 is 44122301.

It is not an unprimeable number, because it can be changed into a prime (103221449) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 454607 + ... + 454833.

Almost surely, 2^103221440 is an apocalyptic number.

103221440 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 103221440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (148544280).

103221440 is an abundant number, since it is smaller than the sum of its proper divisors (193867120).

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

103221440 is a wasteful number, since it uses less digits than its factorization.

103221440 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 287 (or 270 counting only the distinct ones).

The product of its (nonzero) digits is 192, while the sum is 17.

The square root of 103221440 is about 10159.7952735279. The cubic root of 103221440 is about 469.0905000971.

Adding to 103221440 its reverse (44122301), we get a palindrome (147343741).

The spelling of 103221440 in words is "one hundred three million, two hundred twenty-one thousand, four hundred forty".