51986801 has 4 divisors (see below), whose sum is σ = 52613232. Its totient is φ = 51360372.

The previous prime is 51986797. The next prime is 51986807. The reversal of 51986801 is 10868915.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 51986801 - 2² = 51986797 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51986807) 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 3 ways as a sum of consecutive naturals, for example, 313091 + ... + 313256.

It is an arithmetic number, because the mean of its divisors is an integer number (13153308).

Almost surely, 2^51986801 is an apocalyptic number.

It is an amenable number.

51986801 is a deficient number, since it is larger than the sum of its proper divisors (626431).

51986801 is an equidigital number, since it uses as much as digits as its factorization.

51986801 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 626430.

The product of its (nonzero) digits is 17280, while the sum is 38.

The square root of 51986801 is about 7210.1873068596. The cubic root of 51986801 is about 373.2195326153.

The spelling of 51986801 in words is "fifty-one million, nine hundred eighty-six thousand, eight hundred one".