51773861 has 2 divisors, whose sum is σ = 51773862. Its totient is φ = 51773860.

The previous prime is 51773819. The next prime is 51773867. The reversal of 51773861 is 16837715.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 46321636 + 5452225 = 6806^2 + 2335^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51773861 is a prime.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51773867) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25886930 + 25886931.

It is an arithmetic number, because the mean of its divisors is an integer number (25886931).

Almost surely, 2^51773861 is an apocalyptic number.

It is an amenable number.

51773861 is a deficient number, since it is larger than the sum of its proper divisors (1).

51773861 is an equidigital number, since it uses as much as digits as its factorization.

51773861 is an evil number, because the sum of its binary digits is even.

The product of its digits is 35280, while the sum is 38.

The square root of 51773861 is about 7195.4055479869. The cubic root of 51773861 is about 372.7092612770.

The spelling of 51773861 in words is "fifty-one million, seven hundred seventy-three thousand, eight hundred sixty-one".