51601149 has 6 divisors (see below), whose sum is σ = 74535006. Its totient is φ = 34400760.

The previous prime is 51601129. The next prime is 51601153. The reversal of 51601149 is 94110615.

51601149 is a `hidden beast` number, since 51 + 601 + 1 + 4 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 32285124 + 19316025 = 5682^2 + 4395^2 .

It is not a de Polignac number, because 51601149 - 2⁵ = 51601117 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 (51601129) 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 5 ways as a sum of consecutive naturals, for example, 2866722 + ... + 2866739.

It is an arithmetic number, because the mean of its divisors is an integer number (12422501).

Almost surely, 2^51601149 is an apocalyptic number.

It is an amenable number.

51601149 is a deficient number, since it is larger than the sum of its proper divisors (22933857).

51601149 is a wasteful number, since it uses less digits than its factorization.

51601149 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5733467 (or 5733464 counting only the distinct ones).

The product of its (nonzero) digits is 1080, while the sum is 27.

The square root of 51601149 is about 7183.3939749954. The cubic root of 51601149 is about 372.2943603194.

The spelling of 51601149 in words is "fifty-one million, six hundred one thousand, one hundred forty-nine".