51829209 has 12 divisors (see below), whose sum is σ = 79268436. Its totient is φ = 32520192.

The previous prime is 51829181. The next prime is 51829223. The reversal of 51829209 is 90292815.

It can be written as a sum of positive squares in 2 ways, for example, as 41409225 + 10419984 = 6435^2 + 3228^2 .

It is not a de Polignac number, because 51829209 - 2¹³ = 51821017 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51829249) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 169224 + ... + 169529.

It is an arithmetic number, because the mean of its divisors is an integer number (6605703).

Almost surely, 2^51829209 is an apocalyptic number.

It is an amenable number.

51829209 is a deficient number, since it is larger than the sum of its proper divisors (27439227).

51829209 is a wasteful number, since it uses less digits than its factorization.

51829209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 338776 (or 338773 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The square root of 51829209 is about 7199.2505859985. The cubic root of 51829209 is about 372.8420268929.

The spelling of 51829209 in words is "fifty-one million, eight hundred twenty-nine thousand, two hundred nine".