51377171 has 2 divisors, whose sum is σ = 51377172. Its totient is φ = 51377170.

The previous prime is 51377153. The next prime is 51377173. The reversal of 51377171 is 17177315.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51377171 - 2⁶ = 51377107 is a prime.

It is a super-2 number, since 2×51377171² = 5279227399926482, which contains 22 as substring.

It is a Sophie Germain prime.

Together with 51377173, 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 (51377173) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688585 + 25688586.

It is an arithmetic number, because the mean of its divisors is an integer number (25688586).

Almost surely, 2^51377171 is an apocalyptic number.

51377171 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377171 is an equidigital number, since it uses as much as digits as its factorization.

51377171 is an evil number, because the sum of its binary digits is even.

The product of its digits is 5145, while the sum is 32.

The square root of 51377171 is about 7167.7870364569. The cubic root of 51377171 is about 371.7549234617.

The spelling of 51377171 in words is "fifty-one million, three hundred seventy-seven thousand, one hundred seventy-one".