5171220081 has 24 divisors (see below), whose sum is σ = 7714077696. Its totient is φ = 3334720320.

The previous prime is 5171220077. The next prime is 5171220083. The reversal of 5171220081 is 1800221715.

It is not a de Polignac number, because 5171220081 - 2² = 5171220077 is a prime.

It is a super-2 number, since 2×5171220081² = 53483034252275293122, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (5171220083) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1156456 + ... + 1160918.

It is an arithmetic number, because the mean of its divisors is an integer number (321419904).

Almost surely, 2^5171220081 is an apocalyptic number.

It is an amenable number.

5171220081 is a deficient number, since it is larger than the sum of its proper divisors (2542857615).

5171220081 is a wasteful number, since it uses less digits than its factorization.

5171220081 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8653 (or 8650 counting only the distinct ones).

The product of its (nonzero) digits is 1120, while the sum is 27.

The square root of 5171220081 is about 71911.1957973166. The cubic root of 5171220081 is about 1729.2761047471.

Adding to 5171220081 its reverse (1800221715), we get a palindrome (6971441796).

The spelling of 5171220081 in words is "five billion, one hundred seventy-one million, two hundred twenty thousand, eighty-one".