51889149 has 48 divisors (see below), whose sum is σ = 85765680. Its totient is φ = 29998080.

The previous prime is 51889147. The next prime is 51889153. The reversal of 51889149 is 94198815.

51889149 is a `hidden beast` number, since 518 + 8 + 91 + 49 = 666.

It can be written as a sum of positive squares in 8 ways, for example, as 9548100 + 42341049 = 3090^2 + 6507^2 .

It is not a de Polignac number, because 51889149 - 2¹ = 51889147 is a prime.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51889147) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 138927 + ... + 139299.

It is an arithmetic number, because the mean of its divisors is an integer number (1786785).

Almost surely, 2^51889149 is an apocalyptic number.

It is an amenable number.

51889149 is a deficient number, since it is larger than the sum of its proper divisors (33876531).

51889149 is a wasteful number, since it uses less digits than its factorization.

51889149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 462 (or 459 counting only the distinct ones).

The product of its digits is 103680, while the sum is 45.

The square root of 51889149 is about 7203.4123163956. The cubic root of 51889149 is about 372.9857009711.

The spelling of 51889149 in words is "fifty-one million, eight hundred eighty-nine thousand, one hundred forty-nine".