5101681 has 4 divisors (see below), whose sum is σ = 5494132. Its totient is φ = 4709232.

The previous prime is 5101673. The next prime is 5101687. The reversal of 5101681 is 1861015.

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 1915456 + 3186225 = 1384^2 + 1785^2 .

It is a cyclic number.

It is not a de Polignac number, because 5101681 - 2³ = 5101673 is a prime.

It is a super-2 number, since 2×5101681² = 52054298051522, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5101687) 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, 196206 + ... + 196231.

It is an arithmetic number, because the mean of its divisors is an integer number (1373533).

Almost surely, 2^5101681 is an apocalyptic number.

It is an amenable number.

5101681 is a deficient number, since it is larger than the sum of its proper divisors (392451).

5101681 is a wasteful number, since it uses less digits than its factorization.

5101681 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 392450.

The product of its (nonzero) digits is 240, while the sum is 22.

The square root of 5101681 is about 2258.6901071196. The cubic root of 5101681 is about 172.1489718014.

Adding to 5101681 its reverse (1861015), we get a palindrome (6962696).

The spelling of 5101681 in words is "five million, one hundred one thousand, six hundred eighty-one".