51771277 has 2 divisors, whose sum is σ = 51771278. Its totient is φ = 51771276.

The previous prime is 51771263. The next prime is 51771319. The reversal of 51771277 is 77217715.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 39702601 + 12068676 = 6301^2 + 3474^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51771277 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51771217) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25885638 + 25885639.

It is an arithmetic number, because the mean of its divisors is an integer number (25885639).

Almost surely, 2^51771277 is an apocalyptic number.

It is an amenable number.

51771277 is a deficient number, since it is larger than the sum of its proper divisors (1).

51771277 is an equidigital number, since it uses as much as digits as its factorization.

51771277 is an evil number, because the sum of its binary digits is even.

The product of its digits is 24010, while the sum is 37.

The square root of 51771277 is about 7195.2259867220. The cubic root of 51771277 is about 372.7030606142.

The spelling of 51771277 in words is "fifty-one million, seven hundred seventy-one thousand, two hundred seventy-seven".