51377771 has 2 divisors, whose sum is σ = 51377772. Its totient is φ = 51377770.

The previous prime is 51377743. The next prime is 51377773. The reversal of 51377771 is 17777315.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51377771 is a prime.

Together with 51377773, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51377773) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688885 + 25688886.

It is an arithmetic number, because the mean of its divisors is an integer number (25688886).

Almost surely, 2^51377771 is an apocalyptic number.

51377771 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377771 is an equidigital number, since it uses as much as digits as its factorization.

51377771 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 36015, while the sum is 38.

The square root of 51377771 is about 7167.8288902568. The cubic root of 51377771 is about 371.7563706160.

The spelling of 51377771 in words is "fifty-one million, three hundred seventy-seven thousand, seven hundred seventy-one".