51792209 has 4 divisors (see below), whose sum is σ = 59191104. Its totient is φ = 44393316.

The previous prime is 51792203. The next prime is 51792239. The reversal of 51792209 is 90229715.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51792209 - 2¹⁶ = 51726673 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51792203) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3699437 + ... + 3699450.

It is an arithmetic number, because the mean of its divisors is an integer number (14797776).

Almost surely, 2^51792209 is an apocalyptic number.

It is an amenable number.

51792209 is a deficient number, since it is larger than the sum of its proper divisors (7398895).

51792209 is an equidigital number, since it uses as much as digits as its factorization.

51792209 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7398894.

The product of its (nonzero) digits is 11340, while the sum is 35.

The square root of 51792209 is about 7196.6804153026. The cubic root of 51792209 is about 372.7532838895.

The spelling of 51792209 in words is "fifty-one million, seven hundred ninety-two thousand, two hundred nine".