51300209 has 8 divisors (see below), whose sum is σ = 54315840. Its totient is φ = 48316176.

The previous prime is 51300199. The next prime is 51300211. The reversal of 51300209 is 90200315.

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 51300209 - 2²⁴ = 34522993 is a prime.

It is a super-2 number, since 2×51300209² = 5263422886887362, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51300289) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4517 + ... + 11090.

It is an arithmetic number, because the mean of its divisors is an integer number (6789480).

Almost surely, 2^51300209 is an apocalyptic number.

It is an amenable number.

51300209 is a deficient number, since it is larger than the sum of its proper divisors (3015631).

51300209 is a wasteful number, since it uses less digits than its factorization.

51300209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15799.

The product of its (nonzero) digits is 270, while the sum is 20.

The square root of 51300209 is about 7162.4164218509. The cubic root of 51300209 is about 371.5692034878.

The spelling of 51300209 in words is "fifty-one million, three hundred thousand, two hundred nine".