5172238685 has 4 divisors (see below), whose sum is σ = 6206686428. Its totient is φ = 4137790944.

The previous prime is 5172238619. The next prime is 5172238693. The reversal of 5172238685 is 5868322715.

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 1067786329 + 4104452356 = 32677^2 + 64066^2 .

It is a cyclic number.

It is not a de Polignac number, because 5172238685 - 2²⁴ = 5155461469 is a prime.

It is a super-2 number, since 2×5172238685² = 53504106029221058450, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 517223864 + ... + 517223873.

It is an arithmetic number, because the mean of its divisors is an integer number (1551671607).

Almost surely, 2^5172238685 is an apocalyptic number.

It is an amenable number.

5172238685 is a deficient number, since it is larger than the sum of its proper divisors (1034447743).

5172238685 is a wasteful number, since it uses less digits than its factorization.

5172238685 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1034447742.

The product of its digits is 806400, while the sum is 47.

The square root of 5172238685 is about 71918.2778228178. The cubic root of 5172238685 is about 1729.3896390059.

The spelling of 5172238685 in words is "five billion, one hundred seventy-two million, two hundred thirty-eight thousand, six hundred eighty-five".