51090863 has 2 divisors, whose sum is σ = 51090864. Its totient is φ = 51090862.

The previous prime is 51090859. The next prime is 51090869. The reversal of 51090863 is 36809015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51090863 - 2² = 51090859 is a prime.

It is a super-2 number, since 2×51090863² = 5220552564169538, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51090869) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25545431 + 25545432.

It is an arithmetic number, because the mean of its divisors is an integer number (25545432).

Almost surely, 2^51090863 is an apocalyptic number.

51090863 is a deficient number, since it is larger than the sum of its proper divisors (1).

51090863 is an equidigital number, since it uses as much as digits as its factorization.

51090863 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6480, while the sum is 32.

The square root of 51090863 is about 7147.7872799909. The cubic root of 51090863 is about 371.0630809398.

Adding to 51090863 its reverse (36809015), we get a palindrome (87899878).

The spelling of 51090863 in words is "fifty-one million, ninety thousand, eight hundred sixty-three".