51226619 has 2 divisors, whose sum is σ = 51226620. Its totient is φ = 51226618.

The previous prime is 51226607. The next prime is 51226657. The reversal of 51226619 is 91662215.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51226619 - 2²⁴ = 34449403 is a prime.

It is a super-2 number, since 2×51226619² = 5248332988342322, which contains 22 as substring.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (51226699) 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, 25613309 + 25613310.

It is an arithmetic number, because the mean of its divisors is an integer number (25613310).

Almost surely, 2^51226619 is an apocalyptic number.

51226619 is a deficient number, since it is larger than the sum of its proper divisors (1).

51226619 is an equidigital number, since it uses as much as digits as its factorization.

51226619 is an odious number, because the sum of its binary digits is odd.

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

The square root of 51226619 is about 7157.2773454715. The cubic root of 51226619 is about 371.3914468178.

The spelling of 51226619 in words is "fifty-one million, two hundred twenty-six thousand, six hundred nineteen".