51478000239 has 8 divisors (see below), whose sum is σ = 68651166640. Its totient is φ = 34311750336.

The previous prime is 51478000207. The next prime is 51478000241. The reversal of 51478000239 is 93200087415.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 51478000239 - 2⁵ = 51478000207 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51478000197 and 51478000206.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51478000289) 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, 1711732 + ... + 1741545.

It is an arithmetic number, because the mean of its divisors is an integer number (8581395830).

Almost surely, 2^51478000239 is an apocalyptic number.

51478000239 is a deficient number, since it is larger than the sum of its proper divisors (17173166401).

51478000239 is a wasteful number, since it uses less digits than its factorization.

51478000239 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3458249.

The product of its (nonzero) digits is 60480, while the sum is 39.

The spelling of 51478000239 in words is "fifty-one billion, four hundred seventy-eight million, two hundred thirty-nine", and thus it is an aban number.