51780127 has 8 divisors (see below), whose sum is σ = 60553856. Its totient is φ = 43350552.

The previous prime is 51780121. The next prime is 51780139. The reversal of 51780127 is 72108715.

It is a happy number.

51780127 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 51780127 - 2³ = 51780119 is a prime.

It is a super-2 number, since 2×51780127² = 5362363104272258, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51780121) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 85713 + ... + 86314.

It is an arithmetic number, because the mean of its divisors is an integer number (7569232).

Almost surely, 2^51780127 is an apocalyptic number.

51780127 is a deficient number, since it is larger than the sum of its proper divisors (8773729).

51780127 is a wasteful number, since it uses less digits than its factorization.

51780127 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 172077.

The product of its (nonzero) digits is 3920, while the sum is 31.

The square root of 51780127 is about 7195.8409515497. The cubic root of 51780127 is about 372.7242965475.

The spelling of 51780127 in words is "fifty-one million, seven hundred eighty thousand, one hundred twenty-seven".