103561220 has 24 divisors (see below), whose sum is σ = 248547264. Its totient is φ = 35506656.

The previous prime is 103561217. The next prime is 103561253. The reversal of 103561220 is 22165301.

It is a super-3 number, since 3×103561220³ (a number of 25 digits) contains 333 as substring.

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 = 103561192 and 103561201.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 369722 + ... + 370001.

It is an arithmetic number, because the mean of its divisors is an integer number (10356136).

Almost surely, 2^103561220 is an apocalyptic number.

103561220 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

103561220 is an abundant number, since it is smaller than the sum of its proper divisors (144986044).

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

103561220 is a wasteful number, since it uses less digits than its factorization.

103561220 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 739739 (or 739737 counting only the distinct ones).

The product of its (nonzero) digits is 360, while the sum is 20.

The square root of 103561220 is about 10176.5033287471. The cubic root of 103561220 is about 469.6046471606.

The spelling of 103561220 in words is "one hundred three million, five hundred sixty-one thousand, two hundred twenty".