51280823 has 16 divisors (see below), whose sum is σ = 61814016. Its totient is φ = 41965440.

The previous prime is 51280819. The next prime is 51280841. The reversal of 51280823 is 32808215.

It is not a de Polignac number, because 51280823 - 2² = 51280819 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51280813) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1661 + ... + 10262.

It is an arithmetic number, because the mean of its divisors is an integer number (3863376).

Almost surely, 2^51280823 is an apocalyptic number.

51280823 is a deficient number, since it is larger than the sum of its proper divisors (10533193).

51280823 is a wasteful number, since it uses less digits than its factorization.

51280823 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11974.

The product of its (nonzero) digits is 3840, while the sum is 29.

The square root of 51280823 is about 7161.0629797538. The cubic root of 51280823 is about 371.5223930995.

The spelling of 51280823 in words is "fifty-one million, two hundred eighty thousand, eight hundred twenty-three".