51392449 has 2 divisors, whose sum is σ = 51392450. Its totient is φ = 51392448.

The previous prime is 51392447. The next prime is 51392459. The reversal of 51392449 is 94429315.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47169424 + 4223025 = 6868^2 + 2055^2 .

It is a cyclic number.

It is not a de Polignac number, because 51392449 - 2¹ = 51392447 is a prime.

Together with 51392447, it forms a pair of twin primes.

It is not a weakly prime, because it can be changed into another prime (51392447) 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, 25696224 + 25696225.

It is an arithmetic number, because the mean of its divisors is an integer number (25696225).

Almost surely, 2^51392449 is an apocalyptic number.

It is an amenable number.

51392449 is a deficient number, since it is larger than the sum of its proper divisors (1).

51392449 is an equidigital number, since it uses as much as digits as its factorization.

51392449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 38880, while the sum is 37.

The square root of 51392449 is about 7168.8526976079. The cubic root of 51392449 is about 371.7917693261.

The spelling of 51392449 in words is "fifty-one million, three hundred ninety-two thousand, four hundred forty-nine".