51789249 has 12 divisors (see below), whose sum is σ = 74941776. Its totient is φ = 34463832.

The previous prime is 51789247. The next prime is 51789263. The reversal of 51789249 is 94298715.

51789249 is a `hidden beast` number, since 517 + 8 + 92 + 49 = 666.

51789249 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 51789249 - 2¹ = 51789247 is a prime.

It is a super-3 number, since 3×51789249³ (a number of 24 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (51789247) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 382 + ... + 10184.

It is an arithmetic number, because the mean of its divisors is an integer number (6245148).

Almost surely, 2^51789249 is an apocalyptic number.

It is an amenable number.

51789249 is a deficient number, since it is larger than the sum of its proper divisors (23152527).

51789249 is a wasteful number, since it uses less digits than its factorization.

51789249 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10396 (or 10393 counting only the distinct ones).

The product of its digits is 181440, while the sum is 45.

The square root of 51789249 is about 7196.4747619928. The cubic root of 51789249 is about 372.7461826236.

The spelling of 51789249 in words is "fifty-one million, seven hundred eighty-nine thousand, two hundred forty-nine".