51269549 has 2 divisors, whose sum is σ = 51269550. Its totient is φ = 51269548.

The previous prime is 51269509. The next prime is 51269551. The reversal of 51269549 is 94596215.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33988900 + 17280649 = 5830^2 + 4157^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51269549 is a prime.

Together with 51269551, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (51269509) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25634774 + 25634775.

It is an arithmetic number, because the mean of its divisors is an integer number (25634775).

Almost surely, 2^51269549 is an apocalyptic number.

It is an amenable number.

51269549 is a deficient number, since it is larger than the sum of its proper divisors (1).

51269549 is an equidigital number, since it uses as much as digits as its factorization.

51269549 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 97200, while the sum is 41.

The square root of 51269549 is about 7160.2757628460. The cubic root of 51269549 is about 371.4951649194.

The spelling of 51269549 in words is "fifty-one million, two hundred sixty-nine thousand, five hundred forty-nine".