51899803 has 4 divisors (see below), whose sum is σ = 51971920. Its totient is φ = 51827688.

The previous prime is 51899779. The next prime is 51899819. The reversal of 51899803 is 30899815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51899803 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 51899803.

It is not an unprimeable number, because it can be changed into a prime (51899833) 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 3 ways as a sum of consecutive naturals, for example, 34968 + ... + 36421.

It is an arithmetic number, because the mean of its divisors is an integer number (12992980).

Almost surely, 2^51899803 is an apocalyptic number.

51899803 is a deficient number, since it is larger than the sum of its proper divisors (72117).

51899803 is an equidigital number, since it uses as much as digits as its factorization.

51899803 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 72116.

The product of its (nonzero) digits is 77760, while the sum is 43.

The square root of 51899803 is about 7204.1517890727. The cubic root of 51899803 is about 373.0112266529.

The spelling of 51899803 in words is "fifty-one million, eight hundred ninety-nine thousand, eight hundred three".