51986673 has 18 divisors (see below), whose sum is σ = 75919766. Its totient is φ = 34278912.

The previous prime is 51986657. The next prime is 51986677. The reversal of 51986673 is 37668915.

It is a happy number.

51986673 is a `hidden beast` number, since 519 + 8 + 66 + 73 = 666.

It can be written as a sum of positive squares in 3 ways, for example, as 23503104 + 28483569 = 4848^2 + 5337^2 .

It is not a de Polignac number, because 51986673 - 2⁴ = 51986657 is a prime.

It is a super-2 number, since 2×51986673² = 5405228339217858, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51986677) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 269265 + ... + 269457.

Almost surely, 2^51986673 is an apocalyptic number.

It is an amenable number.

51986673 is a deficient number, since it is larger than the sum of its proper divisors (23933093).

51986673 is a wasteful number, since it uses less digits than its factorization.

51986673 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 545 (or 369 counting only the distinct ones).

The product of its digits is 272160, while the sum is 45.

The square root of 51986673 is about 7210.1784305244. The cubic root of 51986673 is about 373.2192263059.

The spelling of 51986673 in words is "fifty-one million, nine hundred eighty-six thousand, six hundred seventy-three".