103221520 has 40 divisors (see below), whose sum is σ = 240413184. Its totient is φ = 41215872.

The previous prime is 103221497. The next prime is 103221529. The reversal of 103221520 is 25122301.

It is a tau number, because it is divible by the number of its divisors (40).

It is a super-2 number, since 2×103221520² = 21309364382220800, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (16).

It is a junction number, because it is equal to n+sod(n) for n = 103221494 and 103221503.

It is not an unprimeable number, because it can be changed into a prime (103221529) 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, 86367 + ... + 87553.

Almost surely, 2^103221520 is an apocalyptic number.

103221520 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103221520 is an abundant number, since it is smaller than the sum of its proper divisors (137191664).

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

103221520 is a wasteful number, since it uses less digits than its factorization.

103221520 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287 (or 2281 counting only the distinct ones).

The product of its (nonzero) digits is 120, while the sum is 16.

The square root of 103221520 is about 10159.7992106144. The cubic root of 103221520 is about 469.0906212839.

Adding to 103221520 its reverse (25122301), we get a palindrome (128343821).

The spelling of 103221520 in words is "one hundred three million, two hundred twenty-one thousand, five hundred twenty".