51232219 has 2 divisors, whose sum is σ = 51232220. Its totient is φ = 51232218.

The previous prime is 51232217. The next prime is 51232261. The reversal of 51232219 is 91223215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51232219 - 2¹ = 51232217 is a prime.

It is a super-2 number, since 2×51232219² = 5249480527327922, which contains 22 as substring.

Together with 51232217, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 51232193 and 51232202.

It is not a weakly prime, because it can be changed into another prime (51232213) 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 as a sum of consecutive naturals, namely, 25616109 + 25616110.

It is an arithmetic number, because the mean of its divisors is an integer number (25616110).

Almost surely, 2^51232219 is an apocalyptic number.

51232219 is a deficient number, since it is larger than the sum of its proper divisors (1).

51232219 is an equidigital number, since it uses as much as digits as its factorization.

51232219 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1080, while the sum is 25.

The square root of 51232219 is about 7157.6685449942. The cubic root of 51232219 is about 371.4049796019.

The spelling of 51232219 in words is "fifty-one million, two hundred thirty-two thousand, two hundred nineteen".