103321553 has 4 divisors (see below), whose sum is σ = 103363428. Its totient is φ = 103279680.

The previous prime is 103321549. The next prime is 103321579. The reversal of 103321553 is 355123301.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 20729809 + 82591744 = 4553^2 + 9088^2 .

It is a cyclic number.

It is not a de Polignac number, because 103321553 - 2² = 103321549 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103321513) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16988 + ... + 22253.

It is an arithmetic number, because the mean of its divisors is an integer number (25840857).

Almost surely, 2^103321553 is an apocalyptic number.

It is an amenable number.

103321553 is a deficient number, since it is larger than the sum of its proper divisors (41875).

103321553 is an equidigital number, since it uses as much as digits as its factorization.

103321553 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41874.

The product of its (nonzero) digits is 1350, while the sum is 23.

The square root of 103321553 is about 10164.7209996143. The cubic root of 103321553 is about 469.2421058190.

Adding to 103321553 its reverse (355123301), we get a palindrome (458444854).

The spelling of 103321553 in words is "one hundred three million, three hundred twenty-one thousand, five hundred fifty-three".