103312681 has 4 divisors (see below), whose sum is σ = 103373764. Its totient is φ = 103251600.

The previous prime is 103312639. The next prime is 103312687. The reversal of 103312681 is 186213301.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 186213301 = 67 ⋅2779303.

It can be written as a sum of positive squares in 2 ways, for example, as 2611456 + 100701225 = 1616^2 + 10035^2 .

It is a cyclic number.

It is not a de Polignac number, because 103312681 - 2¹¹ = 103310633 is a prime.

It is a super-2 number, since 2×103312681² = 21347020110815522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (103312687) 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, 27930 + ... + 31411.

It is an arithmetic number, because the mean of its divisors is an integer number (25843441).

Almost surely, 2^103312681 is an apocalyptic number.

It is an amenable number.

103312681 is a deficient number, since it is larger than the sum of its proper divisors (61083).

103312681 is an equidigital number, since it uses as much as digits as its factorization.

103312681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61082.

The product of its (nonzero) digits is 864, while the sum is 25.

The square root of 103312681 is about 10164.2845788575. The cubic root of 103312681 is about 469.2286744971.

Adding to 103312681 its reverse (186213301), we get a palindrome (289525982).

The spelling of 103312681 in words is "one hundred three million, three hundred twelve thousand, six hundred eighty-one".