5121328109 has 18 divisors (see below), whose sum is σ = 5392465470. Its totient is φ = 4858033152.

The previous prime is 5121328103. The next prime is 5121328129. The reversal of 5121328109 is 9018231215.

It is a happy number.

It can be written as a sum of positive squares in 9 ways, for example, as 581533225 + 4539794884 = 24115^2 + 67378^2 .

It is not a de Polignac number, because 5121328109 - 2²⁰ = 5120279533 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (5121328103) by changing a digit.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 37381889 + ... + 37382025.

It is an arithmetic number, because the mean of its divisors is an integer number (299581415).

Almost surely, 2^5121328109 is an apocalyptic number.

It is an amenable number.

5121328109 is a deficient number, since it is larger than the sum of its proper divisors (271137361).

5121328109 is an frugal number, since it uses more digits than its factorization.

5121328109 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 497 (or 263 counting only the distinct ones).

The product of its (nonzero) digits is 4320, while the sum is 32.

The square root of 5121328109 is about 71563.4551220104. The cubic root of 5121328109 is about 1723.6967664386.

The spelling of 5121328109 in words is "five billion, one hundred twenty-one million, three hundred twenty-eight thousand, one hundred nine".