51918767 has 2 divisors, whose sum is σ = 51918768. Its totient is φ = 51918766.

The previous prime is 51918749. The next prime is 51918793. The reversal of 51918767 is 76781915.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51918767 - 2⁶ = 51918703 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51918467) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25959383 + 25959384.

It is an arithmetic number, because the mean of its divisors is an integer number (25959384).

Almost surely, 2^51918767 is an apocalyptic number.

51918767 is a deficient number, since it is larger than the sum of its proper divisors (1).

51918767 is an equidigital number, since it uses as much as digits as its factorization.

51918767 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 105840, while the sum is 44.

The square root of 51918767 is about 7205.4678543451. The cubic root of 51918767 is about 373.0566534374.

The spelling of 51918767 in words is "fifty-one million, nine hundred eighteen thousand, seven hundred sixty-seven".