51066823 has 2 divisors, whose sum is σ = 51066824. Its totient is φ = 51066822.

The previous prime is 51066817. The next prime is 51066859. The reversal of 51066823 is 32866015.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51066823 - 2⁵ = 51066791 is a prime.

It is a super-2 number, since 2×51066823² = 5215640822626658, which contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51066023) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25533411 + 25533412.

It is an arithmetic number, because the mean of its divisors is an integer number (25533412).

Almost surely, 2^51066823 is an apocalyptic number.

51066823 is a deficient number, since it is larger than the sum of its proper divisors (1).

51066823 is an equidigital number, since it uses as much as digits as its factorization.

51066823 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 8640, while the sum is 31.

The square root of 51066823 is about 7146.1054428269. The cubic root of 51066823 is about 371.0048725152.

The spelling of 51066823 in words is "fifty-one million, sixty-six thousand, eight hundred twenty-three".