103613221 has 4 divisors (see below), whose sum is σ = 103633600. Its totient is φ = 103592844.

The previous prime is 103613179. The next prime is 103613227. The reversal of 103613221 is 122316301.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 122316301 = 107 ⋅1143143.

It is a cyclic number.

It is not a de Polignac number, because 103613221 - 2⁷ = 103613093 is a prime.

It is a super-3 number, since 3×103613221³ (a number of 25 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103613227) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4420 + ... + 15058.

It is an arithmetic number, because the mean of its divisors is an integer number (25908400).

Almost surely, 2^103613221 is an apocalyptic number.

It is an amenable number.

103613221 is a deficient number, since it is larger than the sum of its proper divisors (20379).

103613221 is an equidigital number, since it uses as much as digits as its factorization.

103613221 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20378.

The product of its (nonzero) digits is 216, while the sum is 19.

The square root of 103613221 is about 10179.0579623067. The cubic root of 103613221 is about 469.6832345736.

Adding to 103613221 its reverse (122316301), we get a palindrome (225929522).

The spelling of 103613221 in words is "one hundred three million, six hundred thirteen thousand, two hundred twenty-one".