5171251669 has 4 divisors (see below), whose sum is σ = 5176317580. Its totient is φ = 5166185760.

The previous prime is 5171251661. The next prime is 5171251691. The reversal of 5171251669 is 9661521715.

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 1752510769 + 3418740900 = 41863^2 + 58470^2 .

It is a cyclic number.

It is not a de Polignac number, because 5171251669 - 2³ = 5171251661 is a prime.

It is a super-2 number, since 2×5171251669² = 53483687648270571122, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5171251661) 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, 2531424 + ... + 2533465.

It is an arithmetic number, because the mean of its divisors is an integer number (1294079395).

Almost surely, 2^5171251669 is an apocalyptic number.

It is an amenable number.

5171251669 is a deficient number, since it is larger than the sum of its proper divisors (5065911).

5171251669 is a wasteful number, since it uses less digits than its factorization.

5171251669 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5065910.

The product of its digits is 113400, while the sum is 43.

The square root of 5171251669 is about 71911.4154289846. The cubic root of 5171251669 is about 1729.2796257900.

The spelling of 5171251669 in words is "five billion, one hundred seventy-one million, two hundred fifty-one thousand, six hundred sixty-nine".