103511213 has 4 divisors (see below), whose sum is σ = 111473628. Its totient is φ = 95548800.

The previous prime is 103511207. The next prime is 103511231. The reversal of 103511213 is 312115301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 312115301 = 6029 ⋅51769.

It can be written as a sum of positive squares in 2 ways, for example, as 44328964 + 59182249 = 6658^2 + 7693^2 .

It is a cyclic number.

It is not a de Polignac number, because 103511213 - 2⁴ = 103511197 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 103511191 and 103511200.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (103511413) 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, 3981188 + ... + 3981213.

It is an arithmetic number, because the mean of its divisors is an integer number (27868407).

Almost surely, 2^103511213 is an apocalyptic number.

103511213 is a gapful number since it is divisible by the number (13) formed by its first and last digit.

It is an amenable number.

103511213 is a deficient number, since it is larger than the sum of its proper divisors (7962415).

103511213 is an equidigital number, since it uses as much as digits as its factorization.

103511213 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7962414.

The product of its (nonzero) digits is 90, while the sum is 17.

The square root of 103511213 is about 10174.0460486475. The cubic root of 103511213 is about 469.5290483974.

Adding to 103511213 its reverse (312115301), we get a palindrome (415626514).

The spelling of 103511213 in words is "one hundred three million, five hundred eleven thousand, two hundred thirteen".