51277747 has 2 divisors, whose sum is σ = 51277748. Its totient is φ = 51277746.

The previous prime is 51277727. The next prime is 51277753. The reversal of 51277747 is 74777215.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51277747 is a prime.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51277727) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25638873 + 25638874.

It is an arithmetic number, because the mean of its divisors is an integer number (25638874).

Almost surely, 2^51277747 is an apocalyptic number.

51277747 is a deficient number, since it is larger than the sum of its proper divisors (1).

51277747 is an equidigital number, since it uses as much as digits as its factorization.

51277747 is an evil number, because the sum of its binary digits is even.

The product of its digits is 96040, while the sum is 40.

The square root of 51277747 is about 7160.8482039490. The cubic root of 51277747 is about 371.5149645543.

The spelling of 51277747 in words is "fifty-one million, two hundred seventy-seven thousand, seven hundred forty-seven".