103220406 has 20 divisors (see below), whose sum is σ = 231290532. Its totient is φ = 34406748.

The previous prime is 103220387. The next prime is 103220419. The reversal of 103220406 is 604022301.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (18).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 9 ways as a sum of consecutive naturals, for example, 318420 + ... + 318743.

Almost surely, 2^103220406 is an apocalyptic number.

103220406 is an abundant number, since it is smaller than the sum of its proper divisors (128070126).

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

103220406 is an equidigital number, since it uses as much as digits as its factorization.

103220406 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 637177 (or 637168 counting only the distinct ones).

The product of its (nonzero) digits is 288, while the sum is 18.

The square root of 103220406 is about 10159.7443865483. The cubic root of 103220406 is about 469.0889337519.

Adding to 103220406 its reverse (604022301), we get a palindrome (707242707).

The spelling of 103220406 in words is "one hundred three million, two hundred twenty thousand, four hundred six".