51798609 has 24 divisors (see below), whose sum is σ = 82162080. Its totient is φ = 32498496.

The previous prime is 51798583. The next prime is 51798647. The reversal of 51798609 is 90689715.

It is not a de Polignac number, because 51798609 - 2⁸ = 51798353 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51798209) 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 23 ways as a sum of consecutive naturals, for example, 2139 + ... + 10400.

It is an arithmetic number, because the mean of its divisors is an integer number (3423420).

Almost surely, 2^51798609 is an apocalyptic number.

It is an amenable number.

51798609 is a deficient number, since it is larger than the sum of its proper divisors (30363471).

51798609 is a wasteful number, since it uses less digits than its factorization.

51798609 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12571 (or 12559 counting only the distinct ones).

The product of its (nonzero) digits is 136080, while the sum is 45.

The square root of 51798609 is about 7197.1250510186. The cubic root of 51798609 is about 372.7686370530.

The spelling of 51798609 in words is "fifty-one million, seven hundred ninety-eight thousand, six hundred nine".