51899 has 2 divisors, whose sum is σ = 51900. Its totient is φ = 51898.

The previous prime is 51893. The next prime is 51907. The reversal of 51899 is 99815.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51899 is a prime.

It is not a weakly prime, because it can be changed into another prime (51893) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25949 + 25950.

It is an arithmetic number, because the mean of its divisors is an integer number (25950).

2⁵¹⁸⁹⁹ is an apocalyptic number.

51899 is a deficient number, since it is larger than the sum of its proper divisors (1).

51899 is an equidigital number, since it uses as much as digits as its factorization.

51899 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3240, while the sum is 32.

The square root of 51899 is about 227.8135202309. The cubic root of 51899 is about 37.3009302885.

The spelling of 51899 in words is "fifty-one thousand, eight hundred ninety-nine".