51377317 has 2 divisors, whose sum is σ = 51377318. Its totient is φ = 51377316.

The previous prime is 51377269. The next prime is 51377321. The reversal of 51377317 is 71377315.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 49999041 + 1378276 = 7071^2 + 1174^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51377317 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51377917) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25688658 + 25688659.

It is an arithmetic number, because the mean of its divisors is an integer number (25688659).

Almost surely, 2^51377317 is an apocalyptic number.

It is an amenable number.

51377317 is a deficient number, since it is larger than the sum of its proper divisors (1).

51377317 is an equidigital number, since it uses as much as digits as its factorization.

51377317 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 15435, while the sum is 34.

The square root of 51377317 is about 7167.7972209041. The cubic root of 51377317 is about 371.7552756036.

The spelling of 51377317 in words is "fifty-one million, three hundred seventy-seven thousand, three hundred seventeen".