51446491 has 2 divisors, whose sum is σ = 51446492. Its totient is φ = 51446490.

The previous prime is 51446449. The next prime is 51446501. The reversal of 51446491 is 19464415.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 51446491 - 2¹¹ = 51444443 is a prime.

It is not a weakly prime, because it can be changed into another prime (51446891) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25723245 + 25723246.

It is an arithmetic number, because the mean of its divisors is an integer number (25723246).

Almost surely, 2^51446491 is an apocalyptic number.

51446491 is a deficient number, since it is larger than the sum of its proper divisors (1).

51446491 is an equidigital number, since it uses as much as digits as its factorization.

51446491 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 17280, while the sum is 34.

The square root of 51446491 is about 7172.6209296184. The cubic root of 51446491 is about 371.9220435366.

The spelling of 51446491 in words is "fifty-one million, four hundred forty-six thousand, four hundred ninety-one".