51340427 has 4 divisors (see below), whose sum is σ = 51416280. Its totient is φ = 51264576.

The previous prime is 51340381. The next prime is 51340463. The reversal of 51340427 is 72404315.

51340427 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51340427 - 2¹⁴ = 51324043 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 51340396 and 51340405.

It is not an unprimeable number, because it can be changed into a prime (51340327) 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 3 ways as a sum of consecutive naturals, for example, 36902 + ... + 38267.

It is an arithmetic number, because the mean of its divisors is an integer number (12854070).

Almost surely, 2^51340427 is an apocalyptic number.

51340427 is a deficient number, since it is larger than the sum of its proper divisors (75853).

51340427 is an equidigital number, since it uses as much as digits as its factorization.

51340427 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 75852.

The product of its (nonzero) digits is 3360, while the sum is 26.

The square root of 51340427 is about 7165.2234438292. The cubic root of 51340427 is about 371.6662782499. Note that the first 3 decimals are identical.

The spelling of 51340427 in words is "fifty-one million, three hundred forty thousand, four hundred twenty-seven".