5195814521 has 4 divisors (see below), whose sum is σ = 5222189412. Its totient is φ = 5169439632.

The previous prime is 5195814497. The next prime is 5195814529. The reversal of 5195814521 is 1254185915.

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 5021706496 + 174108025 = 70864^2 + 13195^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-5195814521 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5195814529) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 13187150 + ... + 13187543.

It is an arithmetic number, because the mean of its divisors is an integer number (1305547353).

Almost surely, 2^5195814521 is an apocalyptic number.

It is an amenable number.

5195814521 is a deficient number, since it is larger than the sum of its proper divisors (26374891).

5195814521 is a wasteful number, since it uses less digits than its factorization.

5195814521 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 26374890.

The product of its digits is 72000, while the sum is 41.

The square root of 5195814521 is about 72081.9985918815. The cubic root of 5195814521 is about 1732.0132621209.

The spelling of 5195814521 in words is "five billion, one hundred ninety-five million, eight hundred fourteen thousand, five hundred twenty-one".