51219769 has 2 divisors, whose sum is σ = 51219770. Its totient is φ = 51219768.

The previous prime is 51219757. The next prime is 51219823. The reversal of 51219769 is 96791215.

51219769 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., 27092025 + 24127744 = 5205^2 + 4912^2 .

It is a cyclic number.

It is not a de Polignac number, because 51219769 - 2¹¹ = 51217721 is a prime.

It is a super-3 number, since 3×51219769³ (a number of 24 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is not a weakly prime, because it can be changed into another prime (51219709) 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, 25609884 + 25609885.

It is an arithmetic number, because the mean of its divisors is an integer number (25609885).

Almost surely, 2^51219769 is an apocalyptic number.

It is an amenable number.

51219769 is a deficient number, since it is larger than the sum of its proper divisors (1).

51219769 is an equidigital number, since it uses as much as digits as its factorization.

51219769 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 34020, while the sum is 40.

The square root of 51219769 is about 7156.7987955510. The cubic root of 51219769 is about 371.3748919819.

The spelling of 51219769 in words is "fifty-one million, two hundred nineteen thousand, seven hundred sixty-nine".