51982861 has 8 divisors (see below), whose sum is σ = 59677184. Its totient is φ = 44355600.

The previous prime is 51982859. The next prime is 51982871. The reversal of 51982861 is 16828915.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 51982861 - 2¹ = 51982859 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51982831) 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 7 ways as a sum of consecutive naturals, for example, 15090 + ... + 18211.

It is an arithmetic number, because the mean of its divisors is an integer number (7459648).

Almost surely, 2^51982861 is an apocalyptic number.

It is an amenable number.

51982861 is a deficient number, since it is larger than the sum of its proper divisors (7694323).

51982861 is a wasteful number, since it uses less digits than its factorization.

51982861 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33531.

The product of its digits is 34560, while the sum is 40.

The square root of 51982861 is about 7209.9140771579. The cubic root of 51982861 is about 373.2101037982.

The spelling of 51982861 in words is "fifty-one million, nine hundred eighty-two thousand, eight hundred sixty-one".