51273129 has 8 divisors (see below), whose sum is σ = 68461120. Its totient is φ = 34133616.

The previous prime is 51273121. The next prime is 51273149. The reversal of 51273129 is 92137215.

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

It is not a de Polignac number, because 51273129 - 2³ = 51273121 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51273096 and 51273105.

It is not an unprimeable number, because it can be changed into a prime (51273121) 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, 9574 + ... + 13935.

It is an arithmetic number, because the mean of its divisors is an integer number (8557640).

Almost surely, 2^51273129 is an apocalyptic number.

It is an amenable number.

51273129 is a deficient number, since it is larger than the sum of its proper divisors (17187991).

51273129 is a wasteful number, since it uses less digits than its factorization.

51273129 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24239.

The product of its digits is 3780, while the sum is 30.

The square root of 51273129 is about 7160.5257488539. The cubic root of 51273129 is about 371.5038115187.

It can be divided in two parts, 5127 and 3129, that added together give a triangular number (8256 = T₁₂₈).

The spelling of 51273129 in words is "fifty-one million, two hundred seventy-three thousand, one hundred twenty-nine".