51819223 has 2 divisors, whose sum is σ = 51819224. Its totient is φ = 51819222.

The previous prime is 51819211. The next prime is 51819233. The reversal of 51819223 is 32291815.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51819223 - 2⁵ = 51819191 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51819233) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25909611 + 25909612.

It is an arithmetic number, because the mean of its divisors is an integer number (25909612).

Almost surely, 2^51819223 is an apocalyptic number.

51819223 is a deficient number, since it is larger than the sum of its proper divisors (1).

51819223 is an equidigital number, since it uses as much as digits as its factorization.

51819223 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 4320, while the sum is 31.

The square root of 51819223 is about 7198.5570081788. The cubic root of 51819223 is about 372.8180800381.

The spelling of 51819223 in words is "fifty-one million, eight hundred nineteen thousand, two hundred twenty-three".