51427715 has 4 divisors (see below), whose sum is σ = 61713264. Its totient is φ = 41142168.

The previous prime is 51427709. The next prime is 51427723. The reversal of 51427715 is 51772415.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 51772415 = 5 ⋅10354483.

It is a cyclic number.

It is not a de Polignac number, because 51427715 - 2⁸ = 51427459 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5142767 + ... + 5142776.

It is an arithmetic number, because the mean of its divisors is an integer number (15428316).

Almost surely, 2^51427715 is an apocalyptic number.

51427715 is a deficient number, since it is larger than the sum of its proper divisors (10285549).

51427715 is a wasteful number, since it uses less digits than its factorization.

51427715 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10285548.

The product of its digits is 9800, while the sum is 32.

The square root of 51427715 is about 7171.3119441285. The cubic root of 51427715 is about 371.8767922612.

The spelling of 51427715 in words is "fifty-one million, four hundred twenty-seven thousand, seven hundred fifteen".