51140863 has 2 divisors, whose sum is σ = 51140864. Its totient is φ = 51140862.

The previous prime is 51140861. The next prime is 51140927. The reversal of 51140863 is 36804115.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51140863 - 2¹ = 51140861 is a prime.

Together with 51140861, it forms a pair of twin primes.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51140861) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25570431 + 25570432.

It is an arithmetic number, because the mean of its divisors is an integer number (25570432).

Almost surely, 2^51140863 is an apocalyptic number.

51140863 is a deficient number, since it is larger than the sum of its proper divisors (1).

51140863 is an equidigital number, since it uses as much as digits as its factorization.

51140863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 2880, while the sum is 28.

The square root of 51140863 is about 7151.2840105816. The cubic root of 51140863 is about 371.1840882583.

Adding to 51140863 its reverse (36804115), we get a palindrome (87944978).

It can be divided in two parts, 51140 and 863, that added together give a triangular number (52003 = T₃₂₂).

The spelling of 51140863 in words is "fifty-one million, one hundred forty thousand, eight hundred sixty-three".