51443369 has 2 divisors, whose sum is σ = 51443370. Its totient is φ = 51443368.

The previous prime is 51443323. The next prime is 51443417. The reversal of 51443369 is 96334415.

It is a happy number.

51443369 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 46403344 + 5040025 = 6812^2 + 2245^2 .

It is a cyclic number.

It is not a de Polignac number, because 51443369 - 2²⁰ = 50394793 is a prime.

It is a super-2 number, since 2×51443369² = 5292840428140322, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (51443669) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25721684 + 25721685.

It is an arithmetic number, because the mean of its divisors is an integer number (25721685).

Almost surely, 2^51443369 is an apocalyptic number.

It is an amenable number.

51443369 is a deficient number, since it is larger than the sum of its proper divisors (1).

51443369 is an equidigital number, since it uses as much as digits as its factorization.

51443369 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 35.

The square root of 51443369 is about 7172.4032931787. The cubic root of 51443369 is about 371.9145200944.

The spelling of 51443369 in words is "fifty-one million, four hundred forty-three thousand, three hundred sixty-nine".