103211345 has 4 divisors (see below), whose sum is σ = 123853620. Its totient is φ = 82569072.

The previous prime is 103211341. The next prime is 103211359. The reversal of 103211345 is 543112301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 543112301 = 149 ⋅3645049.

It can be written as a sum of positive squares in 2 ways, for example, as 41886784 + 61324561 = 6472^2 + 7831^2 .

It is a cyclic number.

It is not a de Polignac number, because 103211345 - 2² = 103211341 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (103211341) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10321130 + ... + 10321139.

It is an arithmetic number, because the mean of its divisors is an integer number (30963405).

Almost surely, 2^103211345 is an apocalyptic number.

It is an amenable number.

103211345 is a deficient number, since it is larger than the sum of its proper divisors (20642275).

103211345 is an equidigital number, since it uses as much as digits as its factorization.

103211345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20642274.

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

The square root of 103211345 is about 10159.2984501884. The cubic root of 103211345 is about 469.0752073343.

Adding to 103211345 its reverse (543112301), we get a palindrome (646323646).

The spelling of 103211345 in words is "one hundred three million, two hundred eleven thousand, three hundred forty-five".