51182209 has 16 divisors (see below), whose sum is σ = 57576960. Its totient is φ = 45175680.

The previous prime is 51182207. The next prime is 51182213. The reversal of 51182209 is 90228115.

It is not a de Polignac number, because 51182209 - 2¹ = 51182207 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51182207) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 35154 + ... + 36580.

It is an arithmetic number, because the mean of its divisors is an integer number (3598560).

Almost surely, 2^51182209 is an apocalyptic number.

It is an amenable number.

51182209 is a deficient number, since it is larger than the sum of its proper divisors (6394751).

51182209 is a wasteful number, since it uses less digits than its factorization.

51182209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1560.

The product of its (nonzero) digits is 1440, while the sum is 28.

The square root of 51182209 is about 7154.1742360667. The cubic root of 51182209 is about 371.2840920674.

The spelling of 51182209 in words is "fifty-one million, one hundred eighty-two thousand, two hundred nine".