51189249 has 16 divisors (see below), whose sum is σ = 72550400. Its totient is φ = 32012496.

The previous prime is 51189239. The next prime is 51189253. The reversal of 51189249 is 94298115.

It is not a de Polignac number, because 51189249 - 2⁵ = 51189217 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51189209) 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, 1512 + ... + 10230.

It is an arithmetic number, because the mean of its divisors is an integer number (4534400).

Almost surely, 2^51189249 is an apocalyptic number.

It is an amenable number.

51189249 is a deficient number, since it is larger than the sum of its proper divisors (21361151).

51189249 is a wasteful number, since it uses less digits than its factorization.

51189249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8844.

The product of its digits is 25920, while the sum is 39.

The square root of 51189249 is about 7154.6662395950. Note that the first 3 decimals coincide. The cubic root of 51189249 is about 371.3011143897.

The spelling of 51189249 in words is "fifty-one million, one hundred eighty-nine thousand, two hundred forty-nine".